Stock market today: World shares retreat, though China stocks are lifted by new property measures

World shares are mostly lower though Chinese stocks reversed earlier losses following the announcement of fresh measures to revive the ailing property market. U.S. futures fell and oil prices edged higher. China's central bank said Friday that it was reducing required down payments for housing loans and cutting interest rates for first and second home purchases, among other moves. On Thursday, the Dow Jones Industrial Average briefly topped the 40,000 level for the first time but ended 0.1% lower. The S&P 500 index dipped 0.2%, and the Nasdaq composite fell 0.3%. All three indexes had rallied on Wednesday to all-time highs.