美股股指期货涨幅扩大，纳指期货大涨3%、标普500指数期货上涨2.6%、道指期货涨近2%。

Group 1 - U.S. stock index futures have seen significant gains, with Nasdaq futures rising by 3% [1] - S&P 500 index futures increased by 2.6% [1] - Dow Jones futures are up nearly 2% [1]