Thông tin tài liệu
FACTORS DETERMINING NET INTEREST MARGINS
OF THE COMMERCIAL BANKS IN VIETNAM
In Partial Fulfillment of the Requirements of the Degree of
MASTER OF BUSINESS ADMINISTRATION
In finance
By
Ms. Do Thi Thanh Huyen
ID: MBA03015
International University - Vietnam National University HCMC
February 2013
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THESIS
FACTORS DETERMINING NET INTEREST MARGINS
IN THE COMMERCIAL BANKS IN VIETNAM
In Partial Fulfillment of the Requirements of the Degree of
MASTER OF BUSINESS ADMINISTRATION
In Finance
by
Ms. Do Thi Thanh Huyen
ID: MBA03015
International University - Vietnam National University HCMC
February 2013
Under the guidance and approval of the committee, and approved by all its members,
this thesis has been accepted in partial fulfillment of the requirements for the degree.
Approved:
---------------------------------------------Chairperson
---------------------------------------------Committee member
---------------------------------------------Committee member
--------------------------------------Committee member
--------------------------------------Committee member
--------------------------------------Committee member
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Acknowledge
To complete this thesis, I have been benefited from the following people:
I would like to express my appreciation and say thank my supervisor, Dr. Nguyen
Kim Thu for her careful guidance and support me to complete this thesis.
I also would like to thank all lecturers for teaching me, giving me interesting
knowledge and all office staffs for their support me during two years at International
University.
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Plagiarism Statements
I would like to declare that, apart from the acknowledged references, this
thesis either does not use language, ideas, or other original material from anyone; or
has not been previously submitted to any other educational and research programs or
institutions. I fully understand that any writings in this thesis contradicted to the
above statement will automatically lead to the rejection from the MBA program at
the International University – Vietnam National University Hochiminh City.
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Copyright Statement
This copy of the thesis has been supplied on condition that anyone who
consults it is understood to recognize that its copyright rests with its author and that
no quotation from the thesis and no information derived from it may be published
without the author’s prior consent.
© Đỗ Thị Thanh Huyền/ MBA03015/2013
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Table of Contents
Acknowledge .. ......................................................................................................... i
Plagiarism Statements .............................................................................................. ii
Copyright Statement ............................................................................................... iii
Table of Contents .................................................................................................... iv
List of Abbreviations .............................................................................................. vi
List of Tables . ....................................................................................................... vii
List of Figures.... .................................................................................................. viii
Abstract ............. .................................................................................................... ix
CHAPTER 1.
INTRODUCTION ..................................................................................................1
1. Background. ...................................................................................................1
2. Research objectives ........................................................................................2
3. Research method ............................................................................................2
4. Scope and limitation of the study....................................................................2
5. Research structure ..........................................................................................3
CHAPTER 2............................................................................................................4
OVERVIEW OF VIETNAMESE BANKING SYSTEM ......................................4
1. Growth of Vietnamese banking system .......................................................4
2.
Vietnamese commercial banks performance:……………………………..6
CHAPTER 3 ...........................................................................................................9
LITERATURE REVIEW .......................................................................................9
1. Previous international studies .........................................................................9
2. Previous researches in Vietnam ....................................................................13
CHAPTER 4.......................................................................................................... 14
DATA AND METHODOLOGY .......................................................................... 14
1. Sampling design ........................................................................................... 14
2. Data collection methods ................................................................................ 14
3. Variables ...................................................................................................... 14
4. Framework: ..................................................................................................17
CHAPTER 5………………………………………………………………………..18
FINDINGS ............................................................................................................ 18
1. Descriptive statistics…………………………………………………………18
2. Empirical results .......................................................................................... 19
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CONCLUSIONS ...................................................................................................25
1. Summary of the thesis .................................................................................. 25
2. Limitations ...................................................................................................25
3. Main implications......................................................................................... 26
4. Suggestion for future research ...................................................................... 26
REFERENCES .....................................................................................................28
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List of Abbreviations
ABBank
An Binh Commercial Joint Stock Bank
ACB
Asia Commercial Joint Stock Bank
Agribank
Vietnam Bank for Agriculture and Rural Development
Baovietbank
Bao Viet Joint Stock Commercial Bank
BIDV
Bank of Investment and Development of Vietnam
BVSC
Bao Viet Securities Company
Eximbank
Export and Import Joint Stock Commercial Bank
JSCBs
Joint-stock commercial banks
MHB
Mekong Housing Joint Stock Commercial Bank
NIM
Net interest margins
ROA
Return on Assets
ROE
Return on Equity
Sacombank
Saigon Thuong Tin Commercial Joint Stock Bank
SBV
The State Bank Of Vietnam
SOCBs
State-owned commercial banks
Southern Bank
Southern Bank
VCBS
Vietcombank Securities Co., LTD.
VIB
Vietnam International Joint Stock Bank
Vietcombank
Joint Stock Commercial Bank for Foreign Trade of Vietnam
VietinBank
Vietnam Bank for Industry and Trade
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List of Tables
Table 1. Descriptive statistics of all variables of entire sample................................ 19
Table 2. Descriptive statistics of all variables of SOCBs ......................................... 19
Table 3. Descriptive statistics of all variables of JSCBs .......................................... 19
Table 4. Correlation of independent variables ......................................................... 20
Table 5. Redundant Fixed Effect Tests……………………………………………21
Table 6. Hausman Test result………………………………………………………21
Table 7. Fixed effect model ………………………………………………………22
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List of Figures
Figure 1. Number of commercial banks in Vietnam from 2006 to 2012 .....................4
Figure 2. Total assets of SOCBs and JSCBs from 2008 to 2011 ................................5
Figure 3. Interest rate stipulated by SBV from 2/2008 to 12/2011 .............................6
Figure 4. Bad debt ratios of Vietnamese banking system from 2007 to June 2012 .....7
Figure 5. The percentage of bad debt according to bank types at 31/3/2012...............8
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Abstract
This study investigates the factors determining the net interest margins of 33
Vietnamese commercial banks during the period 2008-2011. Based on the literature
reviews, market power, managerial risk aversion, interest rate risk, credit risk,
management quality and implied payment are the independent variables in the
model. Fixed effects model will be chosen to run regression of panel data. The
empirical analysis points out that managerial risk aversion, credit risk, management
quality and implied payment are statistically significant in explaining bank’s net
interest margins. Among four significant variables said above, only management
quality has negative relationship with net interest margins. Additional, there is no
evidence to conclude that both market power and interest rate risk are significant to
net interest margins.
Keywords: net interest margins, Vietnamese commercial banks.
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CHAPTER 1
INTRODUCTION
1.
Background.
Becoming the fiftieth member of the World Trade Organization is the
Vietnam’s remarkable economic event in 2007. The Vietnamese economy has
accessed to the global market and has gained many achievements. The public data
released by World Bank showed that Vietnam GDP growth rate rose from 8.23% in
2006 to a peak 8.46% in 2007 and the inflation rate was only 8.30% in this same year.
Enterprises have many opportunities not only to develop their domestic market but
also to expand into international market. However, five years later, the economy was
falling down so fast and there has been no signal for complete recovery. In 2011,
GDP growth rate stood at 5.89%, lower than 6.78% in 2010, and 6.31% in 2008. The
inflation rate soared to 23.12% in 2008, much higher than previous year and was
recorded at 18.67% in 2011. Unstable macroeconomic environment makes the
business of enterprises in general and banking system in particular become more
difficult than ever before. Thus, Vietnamese commercial banks not only find the way
to survive, to face to the competition pressures from the foreign financial institutions,
to meet many international standard regulations; but also take an important role in
saving enterprises and economic recovery.
Bank acts as “an intermediary between the demanders and suppliers of funds.”
(Ho and Saunders, 1981, p.583). In recent years, Vietnamese commercial banks seem
to perform this function inefficiently. Companies who are in tremendous need of
capital must suffer high lending interest rates. Although the State Bank of Vietnam
(SBV) imposed a ceiling deposit interest rate in the hope of dragging down lending
interest rates, the access to banking loans remains harsh for companies. In the mean
time, the interest rate spreads (i.e., the difference between lending interest rates and
deposit interest rates) brings huge profits to commercial banks. This is the largest
component of a bank’s net interest income and leads to the ratio net interest margins
(NIM), which measures the return on bank’s earning assets, is high. Accordingly,
commercial banks have been criticized to have maintained high net interest margin
and no difficulty sharing with companies. Despite net interest margins being one of
the major determinants of bank profits, little is known of the determinants of
Vietnamese trading bank interest margins. Why Vietnamese commercial banks need
to maintain high NIM or which variables have strong impact on NIM become the
interesting questions for all those who care about bank sector in Vietnam. Therefore,
in this context, the study will help to explain the queries above. It is likely that the
NIM reflects the costs such as the implied interest payments that the banks have to
offer to its customers. Those non-interest expenses must be accounted for in the net
interest margins. Besides, the high credit risk also partly contributes to the high net
interest margin, as credit risk premium increases in the current economic downturn.
Consequently, the principal objective of this research is to empirically test the model
of bank interest margin determination in the context of Vietnamese banking system.
Based on the findings of the research, the SBV would be able to have effective
solutions (instead of the administrative measures) to reduce the lending rates.
2.
Research objectives
Based on the above-mentioned problems, this research is formulated towards
the following objectives:
To identify the factors determining the net interest margins of 33 Vietnamese
commercial banks.
To examine the impact of determinants on 33 Vietnamese commercial banks
during the period 2008-2011.
To give some recommendations to the State Bank of Vietnam (SBV) and
commercial banks.
3.
Research method
This research will use quantitative method and cover 33 Vietnamese
commercial banks operating during the period from 2008 to 2011. There are various
sources to collect data: banks audited financial statements, public data of World
Bank, annual reports of SBV, and market researches of some securities companies in
Vietnam. All data are published on the official websites of those above-mentioned
institutions. The Eviews software version 6 is used to run regression the data.
4.
Scope and limitation of the study
This study is limited to 33 Vietnamese commercial banks. Foreign
commercial banks and foreign bank branches are beyond the scope of this study.
This study is also limited to the period from 2008 to 2011. From the analysis
mentioned above, this is the period of time in which there have been numerous
fluctuations in the operations of the Vietnamese banking system and of the whole
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economy. This is also the period in which banking operation and the interest rate
policy of the SBV received special attention from businesses.
5.
Research structure
This research includes five chapters and conclusions.
Chapter 1 gives the background and justifies the reasons of conducting this
study. Chapter 2 provides an overview of the banking system in Vietnam, and then
review key theories and empirical studies related to the model development of net
interest margins in chapter 3. Chapter 4 discusses the model used in this research and
explains the relationship between dependent and independent variables. Chapter 5
discusses the results of the regression. Finally, the conclusion will summary all
results mentioned in chapter 5, also the implications, limitations and suggestion for
future researches.
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CHAPTER 2
OVERVIEW OF VIETNAMESE BANKING SYSTEM
This chapter will look around the operation of Vietnamese banking system in
recent years. The achievements banks get, as well as the problems they are facing to
will be considered herein. These characteristics of Vietnamese banking system help
in understanding and explaining for later analysis in the next chapters.
1. Growth of Vietnamese banking system
Though the Vietnamese banking system is quite young compared with others
in the world, it has been growing very fast. The number of commercial banks
increases dramatically, rising from 8 banks in 1991 to 85 banks in 2007 and 98 banks
in 2012. Although VCB, Vietinbank, MHB were equitized, SBV still sort them into
group State-owned commercial banks (SOCBs). Therefore, of those 98 banks, there
are 50 branches of foreign banks, 5 foreign banks, 4 joint-venture banks, 34 jointstock commercial banks (JSCBs), and 5 SOCBs. In the period of 2006-2012, the
Vietnamese banking system has increasingly attracted foreign attention. The number
of foreign banks in Vietnam has increased by 77 percent in this period (see Figure 1).
120
100
5
5
80
4
5
Joint-venture banks
5
44
60
5
5
31
45
53
53
55
41
Joint-stock commercial
banks
40
20
0
Branchs of foreign banks and
wholly foreign-owned banks
37
34
5
5
40
39
37
37
34
5
5
5
5
5
State-owned commercial
banks
2006 2007 2008 2009 2010 2011 2012
Figure 1. Number of commercial banks in Vietnam from 2006 to 2012
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Source: website of SBV (www.sbv.gov.vn), BVSC (www.bvsc.com.vn), and VCBS
(www.vcbs.com.vn).
In addition, commercial banks in Vietnam have grown in both total assets and
equity. As of the end of 2012, website of SBV updated figures about the total assets
of the commercial banking system as VND 5,085,850 billion, up by 3.84% compared
to VND 4,897,774 billion at the end of 2011 (Source: The report of the National
Financial Supervisory Commission 2012). However, there exist differences among
two major banking groups in the growth rates of total assets. While SOCBs are
gradually losing their leader position, JSCBs have an enormous increase in asset
growth rate. For instance, the asset growth rate of ACB, HDB, and Eximbank in
2011 were 37.91%, 98.91% and 40.01% respectively, while this rate of the two
SOCBs - Agribank and BIDV- are 4.68% and 10.78%, respectively (Source: author’s
calculation)
5,000,000
4,500,000
4,000,000
3,500,000
3,000,000
Financial institutions assets
2,500,000
SOCBs (5 banks)
2,000,000
JSCBs (31 banks)
1,500,000
1,000,000
500,000
0
2008
2009
2010
2011
Figure 2. Total assets of SOCBs and JSCBs from 2008 to 2011 (unit: billion)
(Source: Financial reports of 5 SOCBs and 31 JSCBs from 2008 to 2011)
In terms of equity capital, to satisfy the requirement of the SBV on
commercial banks’ minimum chartered capital of VND 3,000 billion, stated in
Decree 141/2006/ND-CP in 2010, chartered capital of most banks except BaoViet
Bank and PG Bank, reached VND 3,000 billion at the end of 2011. Some SOCBs
have the equity capital far above the required level, such as BIDV with capital of
28,251 billion VND, Agribank with capital of 21,103 billion VND and Vietinbank
with capital of 20,230 billion VND. By raising the chartered capital, banks will
enhance their competitiveness and maintain the Capital Adequacy Ratio (CAR) of 9
percent regulated by the Decree 13/2010/TT-NHNN.
2. Vietnamese commercial banks performance:
With some remarkable changes as said above, Vietnamese banking sector
was expected to develop strongly or at least to be stable. However, recently,
commercial banks have to face with problems related to interest rate race and bad
debts. To curb high inflation rates, the SBV implemented the tight monetary policy
in 2008 with a series of solutions. Firstly, VND base deposit rate was applied, from
12% to 14% per year at the first half year of 2008. Next, other tools of monetary
policy were used simultaneously, such as higher reserve requirement and the
issuance of VND 20,300 billion of compulsory SBV bills to withdraw money out of
circulation. Facing with increasing difficulty in capital mobilization, banks rushed to
raise interest rates and provided promotion to encourage deposits from individuals
and organizations. Some small-sized banks adjusted their VND mobilizing interest
rates up to 18% to 19% per annum. Large-sized banks also push their rates to high
point to keep customer’s feet. Besides that, being controlled maximum 150% of the
base interest rate, or within a cap of 18% per annum, banks add more extra fees into
VND lending interest rate to cover the high mobilizing interest rate. Therefore, both
real mobilizing interest rate and lending interest rate increased very high. From 2009
until now, SBV continuously enacts many decrees to stop the interest rate race and
keep it stable.
Base interest rate
Refinancing interest rate
Discount interest rate
Figure 3. Interest rate stipulated by SBV from 2/2008 to 12/2011
(Source: SBV’s website http:// www.sbv.gov.vn)
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Dec-11
Oct-11
Aug-11
Jun-11
Apr-11
Feb-11
Dec-10
Oct-10
Aug-10
Jun-10
Apr-10
Feb-10
Dec-09
Oct-09
Aug-09
Jun-09
Apr-09
Feb-09
Dec-08
Oct-08
Aug-08
Jun-08
Apr-08
Feb-08
16
14
12
10
8
6
4
2
0
With regard to bad debts, this is really the urgent problems of Vietnamese
banking sector. Before 2008, Vietnam’s credit growth was too hot. This growth was
later reduced by the SBV’s tight monetary policy. However, in 2010, although the
global economy has not recovered completely from the 2008 financial crisis, it had to
suffer from the consequences of the debt crisis in the Euro zone in the second quarter
of 2010. Enterprises in Vietnam were also deeply influenced by the crisis, and
numerous enterprises had to do bankrupt or stop their operation. As a result, banks
find it extremely hard to collect their loans made in previous periods. The high
lending interest rate made it harder for companies to repay their debt. Consequently,
banks’ bad debts are growing. According to Chief Inspector of the State Bank of
Vietnam, Mr.Nguyen Huu Nghia’s statement dated 12/7/2012, the bad debts which
was calculated by SBV was 8.6% of total outstanding loans, much higher than 4.47%
reported by the credit institutions.
5.0%
4.47%
4.0%
3.5%
3.0%
2.0%
3.2%
2.2%
2.0%
3.6%
2.5%
1.0%
0.0%
2007
2008
2009
2010
2011
Q1.2012 Q2.2012
Figure 4. Bad debt ratios of Vietnamese banking system from 2007 to June 2012
(Source: Report of Vietnamese banking sector Q2.2012, Vietcombank Securities
Company – VCBS)
It is the fact that the percentage of bad debts in the state-owned banks is much
more than the others. They occupied 50% of bad debt ratio of whole credit market.
The next positions were commercial joint stock banks (27.8%), foreign banks (17.5%)
and the remains belonged to other financial institutions (4.2%). Most of state-owned
banks serve many customers who are state-owned corporations with inefficient
operations. It could be seen as one of the reason explaining why the state-owned
banks stood on top on bad debts ratio.
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4.20%
State-owned banks
17.50%
Commercial joint
stock banks
50.5%
27.80%
Foreign banks
Others
Figure 5. The percentage of bad debt according to bank types at 31/3/2012
(Source: VnEconomy’s website www.vneconomy.com)
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CHAPTER 3
LITERATURE REVIEW
1.
Previous international studies:
Determining the bank’s net interest margins is the attractive subject and
researched in many countries. Ho and Saunders (1981) are considered as the pioneers
in this subject. In their research, they viewed banks as the dealers in the credit market,
providing the services to depositors and loaners. Because the mismatching in
maturity of the deposits and bank loans, banks must face to two kinds of risks:
reinvestment risk and refinancing risk when a change in the short-term rate of
interest and a bank’s unmatched portfolio of the deposits and loans, it will face to
interest rate risk. For instance, having a long-term deposit, but no new loan demand,
bank will invest funds temporarily in money market. In this case, it will get trouble in
reinvestment risk if short-term rate fall. Or having a new loan demand but no inflow
of deposit, bank has to borrow funds from money market. Refinancing risk happens
as short-term rate raise. Hence, banks will determine the optimal interest spread in
order to cover the uncertainty in transactions and interest rate risk. Based on this
reasoning, the study by Ho and Saunders (1981) defined the pure spread (s) as a
function below
=
Where
measures the elasticity of demand and supply in the markets in
which the bank operates. Bank faces relatively inelastic demand and supply (high )
it may be able to exercise monopoly power, and earn a producer's rent by
demanding a greater spread than it could get if banking markets were competitive.
The second term in the model implies that, other things equal, the greater the degree
of risk aversion (measured by R), the larger the size of transactions (measured by Q),
and the greater the variance of interest rates (measured by
), the larger bank margins
are.
The quarterly data from 1976 to 1979 of over 100 US commercial banks, and
cross-section regression were used in this study. Although not explicitly considered
in above equation, the research conducted an empirical study on the determinants of
actual bank margins (M), which comprise a pure spread (s) due to underlying
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transaction uncertainty, plus mark-up for implicit interest expense (IR), the
opportunity cost of required reserves (OR), and default premiums on loans (DP). It
was found that the pure spread and the implied interest expense were statistically
significant, which implied that the main determinants of the size of actual bank
margins were transactions uncertainty and markups to cover implicit payments to
depositors. Then, they tested whether these estimated spreads depend on interest rate
volatility and market structure or not.
Later studies on bank net interest margins have added more independent
variables to the model of Ho and Saunders. The next article done by R.W.McShane
and I.G.Sharpe (1985) continued to contribute new discoveries on NIM and its
determinants. In the case of Australian trading banks, the authors assumed the
uncertainty coming from the instantaneous short-term money market rate, wider than
that from the deposit and loan rates as stated in theory of Ho and Saunders (1981). In
addition, the factors chosen in this approach were the bank’s power in the loan and
deposit markets, interest rate volatility, and risk aversion, uncertainty of the
instantaneous money market risk-free interest rate and average size of transactions.
After running regression with the sample of 22 banks, from 1962 to 1982, they found
that there existed a stable non-linear relationship between NIM and those abovementioned factors. Moreover, upon the hypothesis of differences between business
and personal sectors, they found that in the Australian context, the more personal
business sector, the greater market power and the higher margins are.
Angbazo (1997) developed his model from the previous papers by adding
some risk factors. He concentrated on building a function in which NIM was a
function of those risks and bank specific variables. His sample consisted 286 US
commercial banks with assets equal or over USD 1 billion from 1989 to 1993 and
was estimated by generalized least squares (GLS). The regression’s results showed
the relationship between NIM and determinants by entire sample and by each bank
group. While the default risk proxy was significantly positive, the interest rate risk
was negative and significant to NIM. Three other proxies including capital base,
management quality, and non-interest bearing assets were significantly positive. For
result tested by each bank group, the author realized that the sensitivity of above
variables on NIM of each group was different. For instance, money-center and local
banks’ NIM has relationship with defaults risk, but regional and super-regional banks
did not. In the second part of his study, he continued to test whether off-balance sheet
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had effect on on-balance sheet portfolio risk and NIM or not. His analysis evidenced
that off-balance sheet indirectly led to higher NIM.
Joaquin Maudos and Juan Fernandez de Guevara (2004) indentified the
factors affecting to the interest margin in banking sectors in some Europe countries:
Germany, France, United Kingdom, Italy, and Spain from 1993 to 2000. The
researchers introduced some more variables such as: market power to capture
competitive conditions, operating costs, ect. Most of his variables were significant
and explained as follows. In European banks, the degree of concentration reduced
competition pressure and thus market power increased. Market interest volatility was
found to have a small effect on NIM. Like other result from many previous
researches, Joaquin Maudos and Juan Fernandez de Guevara also tested there was a
positive sign between NIM and implicit payment. One more important discovery in
this paper was that a decrease in level of average production costs would lead to
reduction in NIM.
Another research of Australian banks was provided by Barry William (2007),
who investigated the NIM of 22 domestic banks and 21 foreign subsidiary banks
operating from 1989 to 2001. Not only testing the application of the Ho and Saunders
(1981) model with the core variables- managerial aversion and interest rate risk, he
also considered the extended models like Angbazo (1997) and Joaquin Maudos and
Juan Fernandez de Guevara (2004) such as operating cost, liquidity, management
quality, credit risk, interaction between interest rate risk and credit risk, bank
operation size, implied payment, implied taxes and control variables, in order to have
a framework for Australian banking sector. After running descriptive statistics, he
found that the foreign banks had lower NIM, lower level of retail, but higher levels
of average capital than domestic Australian banks. Four major banks called the Big
Four banks have the lower operating cost, higher management quality, while the
others were very active in their retail banking. Consistent to Ho and Saunders (1981),
regression presented that interest rate volatility and management risk aversion related
positively on NIM. While McShane and Sharpe proposed NIM and market, power to
be positive, William found this relationship was negative in case of whole sample,
but positive consistently in case of NIM of big four banks in Australia. Continuously,
the higher management quality was, the lower NIM was. However, variable liquidity,
implied taxes was found to have no relationship, and credit risk was negative
significantly to NIM.
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Anthony Q.Q.Aboagye, S.K.Aknoena, T.O.Antwi-Asare and A.F.Gockel
(2008) explained the bank’s optimal spread between lending rate and deposits rate in
Ghana. Like other authors, their research relied on Ho and Saunders (1981)
framework and the model of Joaquin Maudos and Juan Fernandez de Guevara (2004).
The determinants here included the bank specific (the competitive structure of
markets, average operating costs, extent of risk aversion, volatility of money market
rates, riskiness of a bank’s loan portfolio, covariance of interaction between interest
rate risk and credit risk and the average size of credit and deposit operations),
industry characteristics (banking industries structure, the Lerner index, the
concentration, opportunity cost of non-earning bank reserves) and macroeconomic
variables (expected inflation and money supply). The quarterly data of 17 Ghanaian
banks was collected. Their finding were: the decrease in market power, bank
concentration, bank total assists, bank equity, inflation and bank staff expenses,
capital expenditure and administrative expenses over total assets would decrease
NIM, while the bank liquidity, central bank lending rate, bank management
efficiency would increase NIM.
Ahmet Ugur and Hakan Erkus (2010) investigate the net interest margins of
both domestic and foreign banks in Turkey. Firstly, they run regression to find the
effect of bank specific factors on the bank spreads, including NIM, bank size, risk
aversion, loan quality, liquidity risk, bank market share, operating costs, personnel
expenses, and management quality. Then, the constant term in the first model called
“pure spread” would become the dependent variable in the second regression. In this
regression, the independent variables were volatility of interest rates, the ratio of
budget deficit to GDP, GDP growth rate, inflation rate and two crisis dummy
variables to capture the effect of the financial crisis in Turkey in two years. The
authors run the descriptive statistics and the panel data random effect model. They
found that the foreign bank had higher internet margin due to their higher operating
costs. However, they also had higher personnel expenses and management quality,
while their market shares were smaller than domestic banks. While NIM and market
share had a negative sign, the bank size, operating costs, and risk adverse affect
positively on NIM. The liquidity ratio was not significant factor in the model. For
the second model, Ahmet Ugur and Hkan Erkus (2010) realized that only inflation
rate significantly affected on the pure spread.
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2.
Previous researches in Vietnam
Ngo Dang Thanh (2010) evaluated the efficiency of Vietnamese banking
system by using Data Envelopment Analysis- DEA. This method calculated the
limited production capacity based on the inputs and compares the current output to
evaluate the effective use of resources. The author focused on analyzing 22
commercial banks in Vietnam in the year of 2008 and chose the inputs as wages,
interest and similar expenses, and other expenses; while the outputs were total asset,
interest and similar income and other incomes. The result showed the way for
Vietnamese banking system to increase its efficiency is managing their lending
activities.
Nguyen Thuy Duong and Tran Hai Yen (2011) analyzed the determinants of
credit growth of commercial banks in Vietnam in 2011. The dataset was collected
from some banks Vietnam in quarter 1, 2, 3 of 2011. They assumed that the credit
growth depends on state ownership, foreign ownership, ROE, liquidity, deposit,
spread between loan interest and deposit interest. Based on the regression model, the
changes in credit growth have positive relationship with deposit and liquidity. Vice
versa, when the spreads increases, the credit growth decreases. In addition,
Vietnamese commercial banks or foreign banks in Vietnam are equally affected, so
two variables state ownership and foreign ownership are not significant.
In summary, the topic “determinants to net interest margins” is one of the
greatest interesting issues in many countries: Europe, Emerging market. They mostly
based on the basic model of Ho and Saunders (1981) and developed their own model,
which are suitable to practice in their countries. Whereas, Vietnam does not have
many studies of this problem. Most of them just evaluate banks performance by
using financial ratios, or only focus on some specific activities of bank, such as
determinants of credit growth, financial structure and bank performances. After
examining the theoretical framework and related empirical studies on bank interest
margins such as Angbazo (1997), Barry William (2007), this paper selects several
factors which are thought to be more appropriate to the determination of net interest
margins in Vietnamese banking system.
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CHAPTER 4
DATA AND METHODOLOGY
In this chapter, the research model will be built upon selected independent
variables and dependent variable NIM. Before going to this important part, the
sample and data collection methods will be introduced.
1.
Sampling design
This study investigates the factors determining NIM of Vietnamese
commercial banks for the period 2008-2011. Thus, sample collected includes 5
SOCBs (Vietcombank, BIDV, Agribank, Vietinbank, and MHB) and 28 JSCBs (see
Appendix A). The requirement is that those banks must have annual financial reports
from 2007-2011 in order to calculate the financial ratios which need average figures
of previous year and current year.
2.
Data collection methods
The secondary data will be used in this research. Firstly, the audited annual
financial statements during the period 2007-2011 will be collected from websites of
33 Vietnamese commercial banks. Secondly, data of 2-year treasury bonds are listed
on Hanoi Stock Exchange and Sacombank Securities Company. The other data will
be gathered from reports of Vietcombank Securities Company, SBV website, ect.
The raw data will be calculated to present for all variables in the model.
3.
Variables
Net interest margins (NIM): it is the dependent variable in the model and
measured by net interest income divided by average earnings assets
Market power (MPO): The greater the market power of the bank is, the
greater the interest spreads banks receive (McShane and Sharpe, 1985). To measure
this variable, McShane and Sharpe (1985) use two alternative calculations, such as:
deposit market share of bank A over deposit market share of entire banking system,
or total assets of bank A over total assets of all financial institutions. While Barry
William (2007) employed that market power as aspect of competition and is very
important to NIM. He applied three ways to definite market power. The first
definition considers bank market share as a percent of total Australian bank assets.
The second one is a percentage of bank and non-bank financial institution assets; and
the third is a percent of bank, non-bank financial institution assets, and securitization
vehicle assets. Which one should be chosen in this paper? McShane and Sharpe
- 14 -
(1985) preferred the narrow market share measure than the others and also agreed all
method would give similar conclusions. Therefore, the variance market power of
each banks in study will calculate by total assets of bank I to total assets of all
financial institutions in Vietnam. The relationship between this factor and NIM are
expected to be positive. Bank, which has more market power, will increase NIM.
Managerial risk aversion (MRV): taking high-risk investment, it will be
expected high return. However, a depository institution often face to sudden risks
such as liquidity risk, credit risk, operational risk, foreign exchange risk, and others,
the overall safety and soundness is more important. Marginal risk aversion helps
commercial banks to protest their performance from failure; and meet requirements
of the international regulation, particularly capital adequacy ratio of Basel I, II, and
III. Moreover, with high risk averse, bank also must recover their higher cost of
equity financing (Ahmet Agur and Hakan Erkun, 2010). In this study, because the
data for calculating capital adequacy ratio in Vietnam is not completely published.
The ratio applied is shareholders funds divided by total assets ((McShane and Sharpe,
(1985), Barry William (2007)).
Interest rate volatility (IRR): The impact of interest rate volatility on bank’s
NIM is supported in many literatures. Along with mismatching in maturities of bank
loans and deposits, the interest rate volatility causes the interest rate risk. In the
researches of Ho and Saunders (1981) or Saunders and Cornett (2009), they analysis
that there are two kinds of interest rate risk which banks must face to. With shortterm borrowing but long-term lending, banks cannot avoid the refinancing risk if
interest rates increase in the future. In this case, banks must pay more for new
liabilities or higher re-borrowing cost for the next period, while the long-terms
lending continuously keeps the low return. Similarly, when the maturity of deposit is
longer than the maturity of loan, banks will face to reinvestment risk if there is a
decrease in interest rate. This means that banks must bear the lower interest rate or
lower return earned on new lending, while the payment for the old liabilities still
based on the old interest rates. Besides that, Perter S.Rose (2009) also mentioned
about price risk, explaining that market value of bonds invested by banks will
decrease due to falling interest rate. So, the sudden changes in interest rate will affect
on banks’ income from loans, securities and on bank’s cost from borrowing. In other
words, NIM will change, involving the decrease or increase in bank’s net profit.
Barry William (2007) used the standard deviation of daily 90-day bank bill rate or 5- 15 -
year Treasury bond rate to measure interest rate volatility on NIM. While Maudos
and Guevara (2004) used three alternative types of financial tools: the three-month
interest rate in inter-bank market, treasury bonds with three-year maturity, treasury
bond with ten year maturity period. They also found the positive impact of this
variable upon three above measures, or in another words, NIM has positive
correlation with short, medium and long-term interest rate. Another method of
calculating interest rate risk provided by Mark J.Flannery and Christopher M.James
(1984), which run AR model and time series models testing the effect interest rate
changes on common stock returns of financial institutions. Following the maturity
mismatch hypothesis mentioned on paper of Mark J.Flannery and Christopher
M.James (1984), Angbazo (1997) applied the net short term by using the account
short-term liabilities minus short-term assets and all divided book value of total
equity capital. For Vietnamese banks, data to calculate maturity gap as Angbazo
(1997) is unavailable, and data of daily treasury bonds in Vietnamese securities
market is also missing. Therefore, in this study, interest rate risk will be measured by
the standard deviation of 2-year treasury bonds auctioned off by government in each
year 2008-2011. Like the first and second variables, interest rate risk is expected
positive to NIM.
Credit risk (CRR): credit risk is the risk which banks loan is very difficult to
collect back from the customers. Most of previous researchers like Angbazo (1997)
and Barry William (2007) agreed that banks holding more risky loans would require
higher NIM. Provision for loans loss divided by total gross loans will measure credit
risk.
Management quality (MQU): The variable will be presented by the ratio
operating cost to gross income. High management quality is proved through the
ability of managers and bank staff in maintaining the growth of revenues regardless
of the cost. In other words, a bank with efficient management will hold assets that are
more profitable and pursue low-cost capital in order to raise NIM higher. The
management quality and bank net interest margins are therefore expected to be
negative (Barry William, 2007).
Implied payment (IP): Ho and Saunders (1981), Barry William (2007) also
measured these variables as total noninterest expense minus total noninterest revenue
and all divided by total earning assets. This calculation will be applied in study with
- 16 -
expectation that more implied payment, more extra interest expense will reflect in
actual NIM of a bank (Ho and Saunders, 1981).
4.
Framework:
The data used herein are panel data and run regression by Eviews software.
The basic model will be formed as follows;
=∝ +
.(
+
) +
.(
) +
.(
) +
(
.(
) +
.(
)
) +
In which, i = 1, 33 banks and t=year 2008, 2009, 2010, 2011.
To run regression of panel data, there are two approaches considered: Fixed
effects model (FEM) and Random effect model (REM). Hausman test will help to
choose which model is better in this case (Damodar N.Gujarati, 2004).
- 17 -
CHAPTER 5
FINDINGS
1.
Descriptive Statistics
Before estimating the regressions, the descriptive statistics will be shown on
table 1, table 2, and table 3. In the first table, the mean of NIM of entire banks is 3.48%
over the period from 2008 to 2011. The maximum value and minimum value are
9.17%, 0.33% respectively. These values are belongs to Western Bank and Southern
Bank, indicating that there is a great varies in this ratio across banks in group JSCBs .
Whereas, the difference between banks in-group SOCBs is not much like that. This is
confirmed by descriptive statistics by bank type in table 2 and table 3. While mean in
NIM between two groups is nearly equal, the standard deviation of JSCBs is more
than twice SOCBs. As mentioned in chapter 2, SOCBs have high total assets in
whole banking systems. Therefore, it is no surprise when the maximum value in
market power 18% comes from SOCBs, and also the maximum value of entire
sample. While one bank of JSCBs hold the lowest total asset 0.08%. Next, table 2
shows the mean of managerial risk aversion ratio of SOCBs is 5.6% and standard
deviation 1.2%, much lower than that of JSCBs.
As said in the overview section of Vietnamese banking sector, besides being
at the head of the total assets, SOCBs such as Agribank, Vietcombank also are banks
with suffering the high bad debts. Table 3 presents JSCBs’ credit risk ratio is just
0.8%, while the other group is 1.07%. Management quality of SOCBs amounts to
53.44% on average, which is 7% higher than overall. And the last variable in this
study is the implied payment ratio. Table 1 reports the implied payment ratio from a
minimum -3%, average of 0.9%, and to maximum of 6.5%. Again, table 3 indicates
that the big distance from smallest to biggest value of this ratio is from JSCBs.
- 18 -
Table 1. Descriptive statistics of all variables of entire sample
NIM
MPO
MRV
IRR
CR
1.59957 0.008512
MQU
IP
Mean
0.034796 0.023464 0.127016
Median
0.033094 0.009872 0.101146 1.044289 0.006057 0.434885 0.009657
Maximum 0.091717 0.180134 0.413903 3.866855 0.050683
0.46493 0.009436
0.88775 0.065762
Minimum
0.003364 0.000832 0.029051 0.442844 0.000000 0.121708
Std. Dev.
0.014562 0.033245 0.079794 1.337226 0.008229
-0.03203
0.1442
0.01205
Table 2. Descriptive statistics of all variables of SOCBs
NIM
MPO
MRV
IRR
1.59957
CR
MQU
IP
Mean
0.033721 0.084756 0.056135
0.01119 0.534027 0.013012
Median
0.031451 0.087524 0.059808 1.044289 0.010693 0.480391 0.013604
Maximum
0.05143
Minimum
0.018983 0.009654 0.029051 0.442844 0.000167 0.299686 0.001618
Std. Dev.
0.008618 0.045629 0.012439 1.366758 0.006851 0.165646 0.006764
0.180134 0.078094 3.866855 0.023174
0.88775 0.024096
Table 3. Descriptive statistics of all variables of JSCBs
NIM
MPO
MRV
IRR
CR
MQU
IP
Mean
0.034987 0.012519 0.139673
Median
0.033305 0.008456 0.112289 1.044289 0.005895 0.425467 0.009088
Maximum
0.091717 0.057377 0.413903 3.866855 0.050683 0.881677 0.065762
Minimum
0.003364 0.000832 0.042556 0.442844 0.000000 0.121708
Std. Dev.
0.015405 0.012255 0.080131 1.338138 0.008388 0.137222 0.012681
2.
1.59957 0.008034 0.452591 0.008797
Empirical results
The first step to check the mutlcollinearity of all independent in this research.
In table, the correlation between dependent variables is low. It means that all factors
are not found to be highly correlated each others. Therefore, these variables will be
kept to continue run regression.
- 19 -
-0.03203
Table 4. Correlation of independent variables
MPO
MRV
IRR
CR
MQU
MPO
1
MRV
-0.463
IRR
0.002701 0.19648
1
CR
0.215263 -0.1563
-0.1386
MQU
0.009331 -0.10402
0.167561 -0.20852
IP
-0.05767
IP
1
1
1
0.197478 0.036459 0.009022 0.408758 1
The regression between dependent variables and independent variable is often
run by Ordinary Least Squares (OLS). However, the simple assumptions of OLS that
the intercept value being the same for each individual over times is not suitable in
reality. Therefore, it is necessary to use other regression techniques for panel data:
Fix effects model (FEM) and random effects model (REM).
The next step is running the regression by FEM with cross section fix effects
and then testing whether FEM is necessary or not. The null hypothesis is that there is
no cross section fixed effect in the data and the alternative is that there is cross
section fixed effect. Eviews table shows the result of p=0.00< 0.05, so the null
hypothesis is rejected or the alternative is accepted. It means that there is cross
section fixed effect.
Table 5. Redundant Fixed Effect Tests
Redundant Fixed Effects Tests
Equation: Untitled
Test cross-section fixed effects
Effects Test
Statistic
Cross-section F
Cross-section Chi-square
d.f.
Prob.
4.322227
(32,93)
0.0000
120.273744
32
0.0000
- 20 -
The Hausman test (1978) will determine the method FEM or REM should be
used. Again, the null hypothesis is that FEM and REM are equal. If this hypothesis is
not rejected, the study should choose REM to estimate the model. Conversely, the
choice belongs to FEM.
Table 6. Hausman Test result
Correlated Random Effects - Hausman Test
Equation: Untitled
Test cross-section random effects
Chi-Sq.
Test Summary
Statistic Chi-Sq. d.f.
Cross-section random
15.392837
6
Prob.
0.0174
The result of Hausman test gives Prob=0.0174 < 0.05, which means that the
null hypothesis is rejected – the FEM and REM is not equal. Therefore the suitable
technique used herein is FEM.
The FEM regression will be showed again to analysis the model of NIM in
Vietnamese banking system.
Table 7. Fixed effect model
Dependent Variable: NIM
Method: Panel Least Squares
Date: 04/08/13 Time: 10:30
Sample: 1 132
Periods included: 4
Cross-sections included: 33
Total panel (balanced) observations: 132
Variable
Coefficient
Std. Error
t-Statistic
Prob.
C
0.037340
0.004726
7.900660
0.0000
MPO
0.053076
0.096778
0.548431
0.5847
MRV
0.083040
0.014543
5.709755
0.0000
- 21 -
IRR
-0.000441
CR
0.353095
MQU
-0.055701
IP
0.981254
0.000455 -0.968619
0.3352
0.122738
2.876816
0.0050
0.006367 -8.748141
0.0000
0.075782
0.0000
12.94840
Effects Specification
Cross-section fixed (dummy variables)
R-squared
0.873346
Mean dependent var
0.034796
Adjusted R-squared
0.821595
S.D. dependent var
0.014562
S.E. of regression
0.006151
Akaike info criterion -7.103782
Sum squared resid
0.003518
Schwarz criterion
Log likelihood
507.8496
Hannan-Quinn criter. -6.757675
F-statistic
16.87587
Durbin-Watson stat
Prob(F-statistic)
0.000000
-6.252045
2.098570
The value for the adjusted R-squared is high 82.15% which evidences that this
model has high explanatory power or 82.15% of the variation in the dependent
variable could be explained by the independent ones.
As predicted, market power is one of significant in explaining NIM. Surprisingly,
it is really positive but insignificant in explaining the changes in NIM of banks in
Vietnam. There are some ideas supporting to this result such as Roman Horvath
(2009), Jesús Gustavo Garza-García (2010). In Vietnam, a bank with big total assets
are often known as large banks and have high market power, such as SOCBs or some
JSCBs like ACB, ABBank, ect.. Looking in NIM of SOCBs in descriptive statistics,
it is recognized that although their average market power (measured by their total
asset to total assets of all financial institutions) are much higher than the JSCBs, their
NIM are similar to the others. Besides that, in the context of Vietnam, SOCBs is
affected by government policy than the others. For example, during the period of
difficult economy, Agribank, MHB, Vietcombank had to comply with the direction
of the SBV on the adjustment of lending interest rates, thereby affecting their NIM.
Furthermore, according to the views of the member of the Board of Directors of
ABBank Dr. Nguyen Tri Hieu, the banks accept breakeven to share the difficulties
with the customers. But so doing, they will get more and more customers trust. This
- 22 -
is also the same views of Barry William (2007), he said that banks would sacrifice
their NIM to get size targets. So, the market power measured by a percentage in total
asset has not significantly explained NIM of Vietnamese commercial banks in this
period.
As seen in the table, managerial risk aversion measured by shareholder’s equity
to total assets is found as a statistically significant factor in model. The correlation
between dependent variable and this determinant is positive, or saying in another
way, if others unchanged, 1% increase in managerial risk aversion leads to 8.3%
increase in NIM. This result is strongly supported by many empirical papers. If a
bank chooses to adopt a low capital ratio, it implies a high risk preference (McShane
and Sharpe, 1985). When banks with more risk aversion or high capital ratio, they
need higher NIM in order to cover their high cost of equity (Ahmet Ugur and Hakan
Erkus, 2010). Besides that, banks with higher shareholder’s equity could provide
initial resources for remaining active when the bank start-up, create the trust for
customers, to deal with and hedge banking business. Therefore, facing to many risk
makes Vietnamese commercial banks need to keep more equity to protest their
business.
The variable interest rate risk measured by standard deviation of 2-year treasury
bond is insignificant to NIM. As explaining in chapter 4, Vietnam does not allow to
get full data for this study. Otherwise, some observers and experts of bond market of
Vietnam, who are working for famous securities companies like Hanoi Stock
Exchange or Sacombank Security Company, also evaluated that in Vietnam market,
it is hard to find out the impact of treasury bond rate on interest rate of bank’s loans
or deposit.
The regression indicates that the relationship between NIM and credit risk is
significant at level 10% and the coefficient is very high. As expected that banks are
more risky loans select higher NIM (Angbazo, 1997), when credit risk increases 1%
in the case of others unchanged, NIM will increase 35,3%.
The next factor affecting the NIM of Vietnamese banking systems is
management quality, which is presented by the operating cost to total income.
According to the regression result, this is evidenced to say that management quality
is significant but negative to NIM. This relationship is consistent to expected
hypothesis and findings provided by Barry William (1997), Saunders and
Schumacher, 2000. It is understood that with others unchanged, if the proportion of
- 23 -
operating cost over total income decreased 1%, the NIM will be increase 5.57%. In
this case, good management quality will minimum costs such as operating costs,
management cost, advertising, promotional, maximum the asset effectiveness to be
reduced lending cost to customers.
The last variable considered herein is implied payment, which has a
significant and positive impact on NIM. As analysis in chapter 2 of overview of
Vietnamese banks within the period 2008-2011, although SBV prescribed interest
rate ceiling, the real deposit interest rate was not lower than it was. The interest rate
race happened recent year and frequently repeated in future. In the context of the low
interest rate, banks, which have the most attractive promotions, customers will
choose. All forms of promotion will help depositors to get higher interest rate than
the prescribed ceiling rates. Moreover, loan customers will be the persons suffering
those costs. Most of commercial banks often promise to offer a suitable loan rate to
customers, but additional costs, such as advisory service charges, appraisal fees
records, disbursements, fees, records management, etc. Therefore, NIM of banks in
Vietnam will be kept stable or even higher due to large difference between high
lending rate and deposit rate.
- 24 -
CHAPTER 6
CONCLUSIONS
1.
Summary of the thesis
The determinants to net interest margin of banks within a country or across
many countries are the highly valuable documents for doing research in Vietnam.
From the basis dealer model of Ho and Saunders (1981) and many developed
versions like McShane and Sharpe (1985), Angbazo (1997) and Barry William
(2007), a model of NIM is examined for banking system in Vietnam. Annual
financial data of 33 Vietnamese commercial banks are collected from 2007 to 2011,
creating a panel data of 132 observations. And the regression estimated by Eviews,
giving the relationship results of all variables. First of all, managerial risk aversion,
credit risk, management quality and implied payment are found as the statistically
significant to NIM. Those results are consistent to all papers of authors mentioned
above. Except management quality impact negatively on NIM, the others are positive
explanations. Among them, implied payment is seen as the variable which has the
highest coefficient with dependent variable. While market power and interest rate
risk have no evidences to be as significant determinants. One of the reasons is the
ability in collecting information to calculate those variables.
2.
Limitations
During the process of doing this research, there are some limitations. The first
problem is collecting data. As mentioned in chapter 2, there are many kinds of banks
and the number of commercial banks increases dramatically. However, most of new
banks were born in 2008 and 2009, so it is too hard to collect data of whole banking
system or data for a long period. Also, it is very difficult to get financial statements
of foreign banks, branches of foreign banks in Vietnam. Therefore,
this study
chooses 33 Vietnamese commercial banks which satisfy the criteria of full data from
the year 2007 to 2011. The second limitation is the ability of measuring variables in
the model. For example, the variable interest rate risk is calculated easily in many
countries like US, Australia, Turkey, and ect. But in Vietnam, to get the daily interest
rate of government treasury bond is unable. Therefore, the study must use the interest
rate of government treasury bond auctioned monthly, announced in Hanoi Stock
Exchange and recorded by the expert of Sacombank securities company. It is also
- 25 -
hard to get quarterly data to make sample longer. Or calculating credit risk by bad
debt ratio is very difficult because many banks don’t release this sensitive
information.
3.
Main implications
From the model of factors determining the NIM of Vietnamese commercial
banks, the relationship between NIM and determinants can help SBV some
recommendations in the banking system management, and commercial banks in
realizing which variables to be important to their NIM. For example, when banks
attract customers by many forms of implied payment, such as presents, promotions,
they need add more fees or interest rate into lending rate in order to cover expenses.
So, the competition between banks didn’t come from development of banking
operations. According to that reason, develop many kind of banks in types and size
from urban to rural, it is avoided the unfair competition between banks in small
market, in some big cities. Also, forbid strictly unsound competition by implied
interest payment, banks will improve their services and provide suitable lending
interest rates .Actually, SBV pay attention much in these problems recently. Many
Decrees were issued, for example the decree No. SBV 02/2011/TT-NHNN,
prohibiting promotions to raise interest rate and also requiring that deposit interest
rate must published clearly. However, the SBV policy is not strong enough and often
run after commercial banks to correct their faults. The insignificant relationship of
interest rate risk and NIM also draws the attention about some tools which has not
used effectively by SBV. Thus, SBV should monitor interest rates to lead the market
by using the tools of open market, not administrative orders. For commercial banks,
it is required to improve the financial capability to reduce credit risk and interest rate
risk, also diversify many kinds of services.
4.
Suggestion for future research
From the limitations of this study, future researches will build a model more
completely than this model, with full of necessary data as international papers. For
instance, the proxy interest rate risk will be measured for each bank, following the
method of Flannery and James (1984). Or measuring this proxy by the ratio net short
term as Angbazo (1997) model. For further future, these methods can be applied if
the bond market develops and provides the daily interest rate of any short term,
medium term and long term treasury bond; or commercial banks pay more attention
to the release of detailed financial statements.
- 26 -
- 27 -
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- 29 -
Appendix A : Joint-stock commercial banks
An binh Commercial Joint Stock Bank
Asia Commercial Joint Stock Bank
BAC A Commercial Joint Stock Bank
DONG A Commercial Joint Stock Bank
Great Asia Commercial Joint Stock Bank
Great Trust Joint Stock Commercial Bank
Housing development Commercial Joint Stock Bank
Kien Long Commercial Joint Stock Bank
Mekong Development Joint Stoct Commercial Bank
Military Commercial Joint Stock Bank
Nam A Commercial Joint Stock Bank
Nam Viet Commercial Joint Stock Bank
OCEAN Commercial Joint Stock Bank
Orient Commercial Joint Stock Bank
Petrolimex Group Commercial Joint Stock Bank
Saigon Thuong Tin Commercial Joint Stock Bank (Sacombank)
Saigon bank for Industry & Trade
Saigon-Hanoi Commercial Joint Stock Bank
Sotheast Asia Commercial Joint Stock Bank
Southern Commercial Joint Stock Bank
The Maritime Commercial Joint Stock Bank
Viet A Commercial Joint Stock Bank
Viet Capital Commercial Joint Stock Bank
Viet nam Commercial Joint Stock of Private Enterprise
Viet Nam Technologicar and Commercial Joint Stock Bank
Vietnam Commercial Joint Stock Bank of Private Enterprise
Vietnam International Commercial Joint Stock Bank
Wetern Rural Commercial Joint Stock Bank
- 30 -
Appendix B
Descriptive statistics of all variables of entire sample
Mean
Median
Maximum
Minimum
Std. Dev.
Skewness
Kurtosis
NIM
0.034796
0.033094
0.091717
0.003364
0.014562
1.07044
5.230922
MPO
0.023464
0.009872
0.180134
0.000832
0.033245
2.381959
8.746265
MRV
0.127016
0.101146
0.413903
0.029051
0.079794
1.550782
5.307784
IRR
1.59957
1.044289
3.866855
0.442844
1.337226
1.032082
2.255426
CR
0.008512
0.006057
0.050683
0.000000
0.008229
2.856519
13.90285
MQU
0.46493
0.434885
0.88775
0.121708
0.1442
0.741603
3.502662
IP
0.009436
0.009657
0.065762
-0.03203
0.01205
-0.16701
7.583011
Jarque-Bera 52.58207 306.4296 82.20062 26.4834 833.3096 13.48913 116.1356
0
0
0 0.000002
0 0.001177
0
Probability
Sum
Sum Sq.
Dev.
Observations
4.593015 3.097216 16.76609 211.1432 1.123615 61.37076 1.245503
0.027779 0.144783 0.834093 234.2506
132
132
132
132
0.00887 2.723981 0.019021
132
132
- 31 -
132
Appendix C
Descriptive statistics of all variables of SOCBs
Mean
Median
Maximum
Minimum
Std. Dev.
Skewness
Kurtosis
NIM
0.033721
0.031451
0.05143
0.018983
0.008618
0.535175
2.655955
MPO
0.084756
0.087524
0.180134
0.009654
0.045629
-0.05375
2.884502
MRV
0.056135
0.059808
0.078094
0.029051
0.012439
-0.67769
2.933611
IRR
1.59957
1.044289
3.866855
0.442844
1.366758
1.032082
2.255426
CR
0.01119
0.010693
0.023174
0.000167
0.006851
0.111846
1.741124
MQU
0.534027
0.480391
0.88775
0.299686
0.165646
0.833677
2.640307
IP
0.013012
0.013604
0.024096
0.001618
0.006764
-0.06895
1.903976
Jarque-Bera 1.053346 0.020747 1.534539 4.012637 1.362338 2.424538 1.016906
Probability
0.590567 0.98968 0.464279 0.134483 0.506025 0.297521 0.601425
Sum
Sum Sq.
Dev.
Observations
0.674417 1.695129 1.122707 31.99139 0.223805 10.68053 0.260234
0.001411 0.039558
20
20
0.00294 35.49252 0.000892 0.521334 0.000869
20
20
20
20
- 32 -
20
Appendix D
Descriptive statistics of all variables of JSCBs
Mean
Median
Maximum
Minimum
Std. Dev.
Skewness
Kurtosis
NIM
0.034987
0.033305
0.091717
0.003364
0.015405
1.025944
4.844117
MPO
0.012519
0.008456
0.057377
0.000832
0.012255
1.627907
5.395075
MRV
0.139673
0.112289
0.413903
0.042556
0.080131
1.465144
4.953702
IRR
1.59957
1.044289
3.866855
0.442844
1.338138
1.032082
2.255426
CR
0.008034
0.005895
0.050683
0.000000
0.008388
3.231214
15.72679
MQU
0.452591
0.425467
0.881677
0.121708
0.137222
0.640706
3.418703
IP
0.008797
0.009088
0.065762
-0.03203
0.012681
-0.06103
7.230079
Jarque-Bera 35.51805 76.23798 57.88319 22.47077 950.7598 8.480864 83.57285
0
0
0 0.000013
0 0.014401
0
Probability
Sum
Sum Sq.
Dev.
Observations
3.918598 1.402087 15.64338 179.1518 0.899811 50.69022 0.985269
0.026341 0.016671 0.712729 198.7581
112
112
112
112
0.00781 2.090109
112
112
- 33 -
0.01785
112
Appendix E
Hausman Test result
Correlated Random Effects - Hausman Test
Equation: Untitled
Test cross-section random effects
Chi-Sq.
Statistic Chi-Sq. d.f.
Test Summary
Cross-section random
15.392837
Prob.
6
0.0174
Random Var(Diff.)
Prob.
Cross-section random effects test comparisons:
Variable
MPO
MRV
IRR
CR
MQU
IP
Fixed
0.053076 0.082282
0.083040 0.080355
-0.000441 -0.000523
0.353095 0.203545
-0.055701 -0.054571
0.981254 0.871824
0.008245
0.000079
0.000000
0.005403
0.000010
0.001402
0.7477
0.7629
0.4820
0.0419
0.7157
0.0035
t-Statistic
Prob.
Cross-section random effects test equation:
Dependent Variable: NIM
Method: Panel Least Squares
Date: 04/08/13 Time: 10:32
Sample: 1 132
Periods included: 4
Cross-sections included: 33
Total panel (balanced) observations: 132
Variable
Coefficient
C
MPO
MRV
IRR
CR
MQU
IP
0.037340
0.053076
0.083040
-0.000441
0.353095
-0.055701
0.981254
Std. Error
0.004726 7.900660
0.096778 0.548431
0.014543 5.709755
0.000455 -0.968619
0.122738 2.876816
0.006367 -8.748141
0.075782 12.94840
0.0000
0.5847
0.0000
0.3352
0.0050
0.0000
0.0000
Effects Specification
Cross-section fixed (dummy variables)
R-squared
0.873346
Mean dependent var
0.034796
- 34 -
Adjusted R-squared
S.E. of regression
Sum squared resid
Log likelihood
F-statistic
Prob(F-statistic)
0.821595
0.006151
0.003518
507.8496
16.87587
0.000000
S.D. dependent var
Akaike info criterion
Schwarz criterion
Hannan-Quinn criter.
Durbin-Watson stat
0.014562
-7.103782
-6.252045
-6.757675
2.098570
- 35 -
Appendix F
Fixed effect model
Dependent Variable: NIM
Method: Panel Least Squares
Date: 04/08/13 Time: 10:30
Sample: 1 132
Periods included: 4
Cross-sections included: 33
Total panel (balanced) observations: 132
Variable
Coefficient
C
MPO
MRV
IRR
CR
MQU
IP
0.037340
0.053076
0.083040
-0.000441
0.353095
-0.055701
0.981254
Std. Error
t-Statistic
0.004726 7.900660
0.096778 0.548431
0.014543 5.709755
0.000455 -0.968619
0.122738 2.876816
0.006367 -8.748141
0.075782 12.94840
Prob.
0.0000
0.5847
0.0000
0.3352
0.0050
0.0000
0.0000
Effects Specification
Cross-section fixed (dummy variables)
R-squared
Adjusted R-squared
S.E. of regression
Sum squared resid
Log likelihood
F-statistic
Prob(F-statistic)
0.873346
0.821595
0.006151
0.003518
507.8496
16.87587
0.000000
Mean dependent var
S.D. dependent var
Akaike info criterion
Schwarz criterion
Hannan-Quinn criter.
Durbin-Watson stat
0.034796
0.014562
-7.103782
-6.252045
-6.757675
2.098570
- 36 -
[...]... of a bank’s net interest income and leads to the ratio net interest margins (NIM), which measures the return on bank’s earning assets, is high Accordingly, commercial banks have been criticized to have maintained high net interest margin and no difficulty sharing with companies Despite net interest margins being one of the major determinants of bank profits, little is known of the determinants of Vietnamese... high lending interest rates Although the State Bank of Vietnam (SBV) imposed a ceiling deposit interest rate in the hope of dragging down lending interest rates, the access to banking loans remains harsh for companies In the mean time, the interest rate spreads (i.e., the difference between lending interest rates and deposit interest rates) brings huge profits to commercial banks This is the largest... non -interest expenses must be accounted for in the net interest margins Besides, the high credit risk also partly contributes to the high net interest margin, as credit risk premium increases in the current economic downturn Consequently, the principal objective of this research is to empirically test the model of bank interest margin determination in the context of Vietnamese banking system Based on the. .. the findings of the research, the SBV would be able to have effective solutions (instead of the administrative measures) to reduce the lending rates 2 Research objectives Based on the above-mentioned problems, this research is formulated towards the following objectives: To identify the factors determining the net interest margins of 33 Vietnamese commercial banks To examine the impact of determinants... herein These characteristics of Vietnamese banking system help in understanding and explaining for later analysis in the next chapters 1 Growth of Vietnamese banking system Though the Vietnamese banking system is quite young compared with others in the world, it has been growing very fast The number of commercial banks increases dramatically, rising from 8 banks in 1991 to 85 banks in 2007 and 98 banks in. .. rate, or within a cap of 18% per annum, banks add more extra fees into VND lending interest rate to cover the high mobilizing interest rate Therefore, both real mobilizing interest rate and lending interest rate increased very high From 2009 until now, SBV continuously enacts many decrees to stop the interest rate race and keep it stable Base interest rate Refinancing interest rate Discount interest rate... Vietinbank, MHB were equitized, SBV still sort them into group State-owned commercial banks (SOCBs) Therefore, of those 98 banks, there are 50 branches of foreign banks, 5 foreign banks, 4 joint-venture banks, 34 jointstock commercial banks (JSCBs), and 5 SOCBs In the period of 2006-2012, the Vietnamese banking system has increasingly attracted foreign attention The number of foreign banks in Vietnam. .. trading bank interest margins Why Vietnamese commercial banks need to maintain high NIM or which variables have strong impact on NIM become the interesting questions for all those who care about bank sector in Vietnam Therefore, in this context, the study will help to explain the queries above It is likely that the NIM reflects the costs such as the implied interest payments that the banks have to offer... while the outputs were total asset, interest and similar income and other incomes The result showed the way for Vietnamese banking system to increase its efficiency is managing their lending activities Nguyen Thuy Duong and Tran Hai Yen (2011) analyzed the determinants of credit growth of commercial banks in Vietnam in 2011 The dataset was collected from some banks Vietnam in quarter 1, 2, 3 of 2011 They... the interest rate risk In the researches of Ho and Saunders (1981) or Saunders and Cornett (2009), they analysis that there are two kinds of interest rate risk which banks must face to With shortterm borrowing but long-term lending, banks cannot avoid the refinancing risk if interest rates increase in the future In this case, banks must pay more for new liabilities or higher re-borrowing cost for the ...THESIS FACTORS DETERMINING NET INTEREST MARGINS IN THE COMMERCIAL BANKS IN VIETNAM In Partial Fulfillment of the Requirements of the Degree of MASTER OF BUSINESS ADMINISTRATION In Finance... Accordingly, commercial banks have been criticized to have maintained high net interest margin and no difficulty sharing with companies Despite net interest margins being one of the major determinants of. .. bank interest margin determination in the context of Vietnamese banking system Based on the findings of the research, the SBV would be able to have effective solutions (instead of the administrative
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