美国股指期货跌幅扩大，道指期货现跌0.7%，标普500指数期货跌0.8%，纳指期货跌约1%。

Core Points - U.S. stock index futures have seen an increase in decline, with Dow futures down by 0.7%, S&P 500 futures down by 0.8%, and Nasdaq futures down by approximately 1% [1]