Capital markets in the United States provide the lifeblood of capitalism. Companies turn to them to raise funds needed to finance the building of factories, office buildings, airplanes, trains, ships, telephone lines, and other assets; to conduct research and development; and to support a host of other essential corporate activities. Much of the money comes from such major institutions as pension funds, insurance companies, banks, foundations, and colleges and universities. Increasingly, it comes from individuals as well. As noted in chapter 3, more than 40 percent of U.S. families owned common stock in the mid-1990s. Very few investors would be willing to buy shares in a company unless they knew they could sell them later if they needed the funds for some other purpose. The stock market and other capital markets allow investors to buy and sell stocks continuously. The markets play several other roles in the American economy as well. They are a source of income for investors. When stocks or other financial assets rise in value, investors become wealthier; often they spend some of this additional wealth, bolstering sales and promoting economic growth. Moreover, because investors buy and sell shares daily on the basis of their expectations for how profitable companies will be in the future, stock prices provide instant feedback to corporate executives about how investors judge their performance. Stock values reflect investor reactions to government policy as well. If the government adopts policies that investors believe will hurt the economy and company profits, the market declines; if investors believe policies will help the economy, the market rises. Critics have sometimes suggested that American investors focus too much on short-term profits; often, these analysts say, companies or policy-makers are discouraged from taking steps that will prove 55