US STOCKS SNAPSHOT - S&P 500 gains for 6th day

NEW YORK, Jan 23- The S&P 500 extended its winning streak to six days on Wednesday after stronger-than-expected profits from IBM and Google alleviated investor concerns about the technology sector. The Dow Jones industrial average gained 66.96 points, or 0.49 percent, to 13,779.17. The Nasdaq Composite Index gained 10.49 points, or 0.33 percent, to 3,153.67.