S&P 500 and Dow futures turn positive ahead of opening bell MarketWatchStock futures are slightly lower begin June as Wall Street aims for third straight monthly advance CNBCOpening Bell: Futures Waver On U.S.-China Trade Flare-Up; Dollar Slumps Investing.comStock-market futures higher as investors weigh report that China halting purchases of soybeans MarketWatchAsia stocks hit 3-month peaks, resilient to U.S.