美股股指期货短线拉升，标普500指数期货和纳指期货涨幅均扩大至日内高点。

Core Viewpoint - US stock index futures experienced a short-term surge, with both S&P 500 and Nasdaq futures expanding their gains to intraday highs [1] Group 1 - S&P 500 index futures showed significant upward movement [1] - Nasdaq futures also reflected a similar trend with increased gains [1]