GLOBAL MARKETS-World stocks dip, but Wall St up; ruble at 5-yr low

* European shares close lower as luxury goods makers slide * S&P 500 above record closing high; retailers strong * China's yuan steady after Tuesday's slide * Ruble hits five-year low on Ukraine fallout * Gold touches four-month peak * Fed Chair Yellen to testify to Senate on Thursday By Chuck Mikolajczak NEW YORK, Feb 26 (Reuters) - World stocks markets edged lower on Wednesday, stung by growing worries over some emerging markets grew as escalating tensions in the