Nikkei falls in choppy trade as market awaits Fed outcome

TOKYO, Sept 17 (Reuters) - Japan's Nikkei share average edged down in choppy trade on Wednesday as investors stayed focused on the outcome of the Federal Reserve's two-day policy meeting amid expectations that it may keep rates low. The Nikkei share average ended 0.1 percent lower to 15,888.67 after trading in positive territory. The U.S. Federal Reserve could offer fresh clues after Wednesday's FOMC monetary meeting on when it plans to begin lifting interest rates and how quickly it wil