美股期指涨幅扩大，纳斯达克100指数期货涨0.53%，标普500指数期货涨0.38%，道琼斯指数期货涨0.26%。

Group 1 - U.S. stock index futures have shown an increase, with Nasdaq 100 futures rising by 0.53% [1] - S&P 500 futures have increased by 0.38% [1] - Dow Jones futures have gained 0.26% [1]