Activity in Stock Market Commercial Banks Stock Owned Savings Institutions Savings Banks Finance Companies Stock Mutual Funds Securities Firms Insurance Companies Pension Funds Use funds from their investment portfolios to invest in stocks. 3 3 Invest a large portion of funds accumulated from contributions from employers and/or employees in the stock market. U 3 Sell shares to individual investors and use the funds to invest in stocks. D U D n Invest a large portion of the premiums they D collect in the stock market