U.S. stocks edged higher on Tuesday, with the blue-chip Dow average boosted by American International Group Inc. after news that Maurice "Hank" Greenberg is stepping down as chairman of the giant insurance company this week. AIG, the subject of government investigations into its business practices, rose about 3 percent to $58.75. In economic news, U.S. consumer confidence fell slightly in March as higher gasoline prices dampened the moods of car-reliant Americans, a report said. The Dow Jones industrial average was up 15.23 points, or 0.15 percent, at 10,500.88. The Standard & Poor's 500 Index was up 2.94 points, or 0.25 percent, at 1,177.22. The technology-laced Nasdaq Composite Index was up 4.88 points, or 0.24 percent, at 1,997.40. Regulators have called billionaire Warren Buffett to answer questions next month about any involvement he might have had in an transaction between a unit of his company, Berkshire Hathaway Inc., and AIG, The Wall Street Journal reported. Berkshire Hathaway "A" shares fell 1.3 percent to $85,600. --More 2312 Local Time 2012 GMT
