... unfavorable,” and “no opinion.” 2 The S&P 500 is an index of 500 stocks chosen for market size, liquidity, and industry group representation. Sources: Investment Company Institute and Standard ... www.ici.org/pdf/per17-05.pdf.Ownership of Mutual Funds, Shareholder Sentiment, and Use of the Internet, 2011KEY FINDINGS »In 2011, 45.0 percent of U.S. households owned shares of mutual funds or other ... moderate household incomes and were in their peak earning and saving years. More than half of U.S. households owning mutual funds had incomes between $25,000 and $99,999, and about two-thirds were...