Stocks rebounded after initially falling lower today, as investors snapped up bargains from depressed equities, MarketWatch reports. MasterCard led advances with a 14% gain after beating profit estimates. Wal-Mart was another strong performer, rising 4.33% on strong January sales. The Dow closed up 106.41 at 8,063.07. The Nasdaq gained 31.19 to 1,546.24, and the S&P 500 rose 13.62, closing at 845.85.