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

Core Viewpoint - US stock futures have seen a significant decline, with the Nasdaq 100 futures down by 0.9%, S&P 500 futures down by 0.8%, and Dow futures also down by 0.8% [1] Group 1 - Nasdaq 100 futures decreased by 0.9% [1] - S&P 500 futures fell by 0.8% [1] - Dow futures dropped by 0.8% [1]