US STOCKS-Wall St up on tech earnings, S&P index knocks on 1,500
January 23, 2013 at 15:08 PM EST
*Google, IBM climb on strong earnings. NEW YORK, Jan 23- U.S. stocks advanced on Wednesday, with the S&P 500 inching up for a sixth day in a row, as stronger-than-expected profits at IBM and Google helped alleviate investor concerns about the tech sector.