8月1日电，美国股指期货跌幅扩大，标准普尔500电子迷你期货下跌1.1%，纳斯达克100期货下跌1.3%，道琼斯期货下跌1.1%。

Core Viewpoint - US stock index futures have experienced a significant decline, indicating a bearish sentiment in the market [1] Group 1 - S&P 500 e-mini futures fell by 1.1% [1] - Nasdaq 100 futures decreased by 1.3% [1] - Dow Jones futures dropped by 1.1% [1]