U.S. stocks were hit again on Tuesday as players continued to worry about developments in the Middle East and first quarter earnings. The Dow industrials, which traded between 10264.86 and 10352.46 Tuesday, closed down 48.99 points or 0.47% at 10313.71. The Nasdaq ended four straight sessions of gains to close down 58.22 points or 3.13% at 1804.40. The S&P 500 ended down 9.93 points or 0.87% at 1136.61.