Dollar eases, stocks gain before Fed meeting; oil up

By Caroline Valetkevitch NEW YORK (Reuters) - World stock indexes edged higher and the U.S. dollar weakened on Monday on expectations the U.S. Federal Reserve will leave interest rates unchanged after its policymakers meet this week, while oil prices surged from multi-week lows. U.S. Treasuries yields dipped as traders booked profit ahead of this week's policymaking meetings at both the Fed and the Bank of Japan. Weak recent U.S. data has boosted bets that the Fed will skip the chance to raise r