NEW YORK (Reuters) - A gauge of global stock markets rose for a seventh straight day in choppy trading on Thursday after hints of progress in the U.S.-China trade dispute, pushing bond yields off lows hit earlier on the heels of new stimulus measures put forth by the European Central Bank. Wall Street equity indexes were buffeted in early trading, moving to early highs and then quickly paring gains on conflicting reports about whether Trump administration officials had considered offering a..