Major averages closed near their intraday lows Thursday, finishing mildly higher after giving up much bigger early gains. The Nasdaq led with a 0.3% gain while the S&P 500 and Dow Jones industrial average each climbed 0.2%. NYSE volume surged following Wednesday’s three-hour trading halt, while Nasdaq turnover was lower, unconfirmed figures showed. Stocks rallied early on the heels of a rebound in China’s stock market, despite weekly U.S.