Stocks stumble at open
U.S. markets hit by weak retail report, continued concern about subprime mortgages.
NEW YORK (CNNMoney.com) -- A weaker-than-expected retail sales was among the factors in an initial U.S. stock selloff Tuesday.
The Dow Jones industrial average and the Nasdaq composite index lost 0.6 percent. The Standard & Poor's 500 dropped 0.5 percent.