Stocks up broadly; U.S. helped by dollar weakness

By Ryan Vlastelica NEW YORK (Reuters) - The U.S. dollar weakened broadly on Monday ahead of the Federal Reserve's policy meeting on worries that the central bank could become more cautious about raising interest rates, while Wall Street stocks rose as the greenback's fall eased worries about its effect on corporate profits. Comments by Italy's central bank governor that the euro has fallen faster than the European Central Bank expected contributed to the currency's rise on Mo