GDP数据公布后，美股股指期货跌幅扩大，纳斯达克100期货下跌1.4%，道指期货0.45%，标普500指数期货跌0.96%。

Group 1 - After the GDP data was released, U.S. stock index futures experienced a significant decline, with Nasdaq 100 futures dropping by 1.4% [1] - Dow futures fell by 0.45%, while S&P 500 index futures decreased by 0.96% [1]