美国股指期货跌幅扩大，纳斯达克100股指期货跌0.3%，标普股指期货和道指期货也跌超0.2%。

Group 1 - US stock index futures have seen an increase in decline, with Nasdaq 100 futures down by 0.3% [1] - S&P 500 futures and Dow futures have also dropped by more than 0.2% [1]