S&P 500 eyes third weekly gain in a row By: MarketWatch February 21, 2014 at 09:53 AM EST U.S. stocks edged up on Friday, as the S&P 500 aimed for its third straight weekly advance and traders waited for a fresh reading on the housing market. Read More >> Related Stocks: Groupon Cl A Hewlett-Packard Standard & Poors 500 The Priceline Group