Tài liệu Bài giảng quản trị rủi ro trong kinh doanh doc

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Tài liệu Bài giảng quản trị rủi ro trong kinh doanh doc

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.#&++/7T*)?&+".+//2/ )?03+/.)'+?2+"#7/*'#.*/3,&5 ").'#)*+)&+.+5+#J  ?+,)&,7)*77%&5,).+//2&' 2 22,+ '? 5 ) +#7 *  #   .+/ 7 / 2   7)*77%&?)?0.+/',)*.'3,&## '#)* 22,+U*37"%5. %*0@)+'+%.+%.,+/77,& !+"6+88.+/708/55+#*7.*'"# 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/')*88'?5-0)?)* %&8*")5 • N0*7'% • N0#,+/"# • N)*77&,X • N0X      10 ?E[VA !E %  T[   U  \    ]8--,2-* UF* '/  ,)    ! =    ]8--, UF* +%    &+"  2+"    ! =   \ 28^)I00-4 5!%   .#   =   ] )I0^)I00-4 5%.3&#T+/ 5&   &  M# =    28^)I0?) 75! %    D =   Z )I0^)I0?) 75.3&#T+/ 5&   &  M# =    _3,>9,-4RZ1!5 ,?!+% ^[_! =  II. ` &`   !" *  !"    )?*.#!" *  !"   \ '#!  2  F*   [...]... gi m b t r i ro, n càng l n m c gi m r i ro càng l n nh ng cu i cùng portfolios c(ng còn ph!n r i ro không th gi m c b)ng cách phân tán, ta g i ó là r i ro h th ng R i ro có th phân tán T ng r i ro R i ro h th ng (không th phân tán) S c phi u trong portfolios 2 Phân tán qua nhi"u ngành Nhi u nhà t v n cho r)ng ch n danh m c !u t g*m nhi u ngành thì có th phân tán c r i ro t t h n ch ch n trong m t ngành... 14 R 15 R &u tiên thanh toán khi phát mãi tài s n c a công ty b phá s n * Chi phí tòa án, lu t s * N ti n l ng công nhân viên (có gi i h n t i a) * N thu Nhà n c * Ch n có th ch p, b o m * Ch n không cb o m * C ông c phi u u ãi * C ông c phi u th ng i ro tài chính i ro thanh kho n i ro do mua l i ch(ng khoán i ro do chuy'n i ch(ng khoán i ro chính tr i ro trong ngành ho t )ng II CÁC PH NG PHÁP PHÂN... >k ≤ ng xác su t phá s n nh sau L* − µp L − µp 1 n =P > ≤ σp σp L* − µp n σp 33 2 = 1 z2 1 k2 PHÂN TÁN I 1 2 3 4 5 6 NGU N C A S B T UT NH TRONG UT R R R R R R • i ro do thi!u thông tin v" công ty i ro do lãi su t i ro t# giá i ro do l$a ch%n i ro do nh th&i i'm i ro v" s(c mua X y ra do l m phát, khi cùng s ti n nh ng không mua c l ng hàng hóa nh tr c ây • Ch s giá c (Consumer price index -CPI) là giá... M THI U R I RO TRONG M T DANH M C B O HI M CÁC R I RO PH THU C L N NHAU 1 Các () ML =M c tr ng c a t n th t trung bình L L1 + L 2 + + L n M(L1 ) + M(L 2 ) + + M(L n ) = = n n 32 p () L + L 2 + + L n DL =D 1 = n σ i2 + i≠ j n σ i, j 2 σ i2 + = r σiσ j i≠ j i, j n 2 = σ2 p ri,j càng nh thì σ 2 càng nh p 2 Xác su t phá s n N u các r i ro không c l p, phân ph i c a L không th x p x chu n Trong tr ng... +ng Wagner và Lau ã nghiên c u v n gi m thi u r i ro khi phân tán !u t n gi n ch trong m t m c ch t l ng (ph n ánh r i ro do v" n ), k t qu nghiên c u cho th y: • V-n có th gi m thi u r i ro nh khi phân tán !u t n gi n qua các m c ch t l ng khác nhau • V i các m c ch t l ng khác nhau r i ro t i thi u có th t n khác nhau M c ch t l ng càng cao thì r i ro có th t n càng th p và l i su t c(ng th p t ng... su t danh ngh a ph i là e= − + = = e 7 R i ro do bi!n )ng th tr &ng 8 R i ro do qu n lý 9 R i ro do v* n+ (Default risk) • Khi công ty t m th i không tr c n do thi u h t ti n m t ta nói công ty b m t kh n#ng chi tr v m t k$ thu t %i u này có th x y ra cho c nh ng công ty ang có l i nhu n cao • Khi tài s n c a công ty ít h n n , công ty b m t kh n#ng chi tr trong tình tr ng phá s n M t công ty m t kh... R I RO TRONG M T DANH M C B O HI M 31 CÁC R I RO 1 Các C L P VÀ KHÔNG NG NH T c tr ng c a t n th t trung bình L () L1 + L 2 + + L n M(L1 ) + M(L 2 ) + + M(L n ) = = n n () L1 + L 2 + + L n D(L1 ) + D(L 2 ) + + D(L n ) = = σ2 P 2 n n ML =M DL =D p 2 Xác su t phá s n Xác su t phá s n: P L > V OL L* n NG M C 1 Hi p ph L* − µp n =P z> σp T NG QUAN GI A CÁC R I RO ng sai (Covariance) N u các r i ro ph... u này úng, nh ng nh ng nghiên c u th c nghi m c a Giáo s Lorie và Fisher cho th y • Phân tán qua nhi u ngành không t t h n phân tán n gi n • S ch ng khoán trong danh m c t#ng quá 8 thì m c gi m r i ro không áng k Khi ch n quá nhi u ch ng khoán trong danh m c thì s phân tán ó là không c!n thi t, lúc ó nhà !u t có th g p nh ng r+c r i sau: • Không th qu n lý t t khi qu n lý quá nhi u lo i ch ng khoán... L T +/ # )2 #' L T +/ 3 ' % ) 2 0 * -: +# " % ( /7 3 &? 2) 7 &+" 9 +"8 + 0 V G M) 2 ' X & 0 1W N 0 7 0 # A ' # # 2 + 4 0 , ,+.+ 30 +4 LÝ THUY T PORTFOLIO VÀ QU N TR R I RO III GI M THI U R I RO TRONG M T DANH M C B O HI M CÁC R I RO C L P VÀ NG NH T 1 nh lý gi i h n trung tâm Phân ph i c a giá tr trung bình c a n bi n ng u nhiên c l p và chung phân ph i, m i bi n có trung bình µ và ph ng sai σ 2 ,... K t qu !u t cho trong b ng d i ây Th&i gian và th&i ti!t t=1 t=2 t=3 t=4 M a N.ng & M a N.ng & M a R i ro N.ng L i su t c a H -10% 35% 20% 15% 0.263 L i su t c a D 30% -15% 0 5% 0.263 L i su t c a dm t 10% 10% 10% 10% 0 2 L+i su t và r i ro c a danh m-c ,u t N u ta phân b !u t trên n ch ng khoán, m,i ch ng khoán có l i su t ri và r i ro σ i , h s t

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