NEW YORK (Reuters) - Stocks closed out their worst week in more than two years on Friday in a volatile session that saw the major indexes whip back and forth before the S&P 500 ended down less than a point. (http://feeds.feedburner.com/~ff/reuters/topNews?d=yIl2AUoC8zA) (http://feeds.feedburner.com/~ff/reuters/topNews?i=ho8E1DiKIUQ:cXFJZWuGQJY:V_sGLiPBpWU) (http://feeds.feedburner.com/~ff/reuters/topNews?i=ho8E1DiKIUQ:cXFJZWuGQJY:-BTjWOF_DHI) (http://feeds.feedburner.com/~r/reuters/topNews/~4/ho8E1DiKIUQ)