GLOBAL MARKETS-Dollar, bond yields rise on U.S. rate hike bets

* Dollar gains vs other currencies post Fed meeting * Global stocks subdued on U.S. rate hike caution * Commodities near 6-year lows on China worries, dollar pressure * Europe set for busy day of data By Marc Jones LONDON, July 30 (Reuters) - The dollar jumped and world stocks were left flat-footed on Thursday after the Federal Reserve painted a relatively bright picture of the U.S. economy, boosting bets that it will hike interest rates in September. Europe's stock mark