A company car completepharmacysolutions.com Stocks rose sharply at the open on Monday as investors betthat former Treasury Secretary Lawrence Summers' withdrawal as acandidate for Federal Reserve chairman could mean slowertapering of stimulus by the U.S. central bank. The Dow Jonesindustrial average rose 147.17 points or 0.96 percent, to15,523.23, the S&P 500 gained 15.44 points or 0.91percent, to 1,703.43 and the Nasdaq Composite added28.554 points or 0.77 percent, to 3,750.739.