美股期货跌幅扩大，纳斯达克100指数期货现跌超0.9%，标普500指数期货跌0.8%，道指期货跌近0.7%。

Group 1 - US stock futures have seen a significant decline, with Nasdaq 100 futures dropping over 0.9% [1] - S&P 500 futures are down by 0.8% [1] - Dow futures have decreased by nearly 0.7% [1]