Dow Jones Industrial Average dropped more than 300 points by mid-day as worldwide financial markets worry about the U.S. credit market. The Dow Jones, as well as the Standard & Poor's 500 and Nasdaq, have lost 10% since July, and a strategist at Absolute Strategy Research tells the Times, "The psychology is shifting notably today. When a market drops by 10 percent, people start to feel it in their portfolios. People are used to......