Global stocks lose steam as nerves persist, euro dips after ECB

NEW YORK (Reuters) - A gauge of world equities was little changed after giving up early gains on Thursday, continuing a pattern seen for the past several sessions, while the euro eased after the European Central Bank formally ended its bond purchasing scheme.In the United States, the S&P and Nasdaq finished in the red while the Dow closed well off its session highs as cautious trade optimism faded. Nervousness has heightened volatility in stocks recently, with a tendency for stocks to lose..