NEW YORK (Reuters) - If debate in Washington over raising the U.S. debt ceiling finally ends with a deal on Sunday, the last-minute reprieve could spark a relief rally when global markets open. (http://feeds.feedburner.com/~ff/reuters/topNews?d=yIl2AUoC8zA) (http://feeds.feedburner.com/~ff/reuters/topNews?i=N6NCjcu5MQg:vpSLZ7FyG3s:V_sGLiPBpWU) (http://feeds.feedburner.com/~ff/reuters/topNews?i=N6NCjcu5MQg:vpSLZ7FyG3s:-BTjWOF_DHI) (http://feeds.feedburner.com/~r/reuters/topNews/~4/N6NCjcu5MQg)