美股三大指数涨幅扩大，纳指涨超1%，道指、标普500指数涨近1%。特朗普此前表示，股市将会翻倍。

Core Viewpoint - The U.S. stock market indices have seen significant gains, with the Nasdaq rising over 1% and both the Dow Jones and S&P 500 increasing nearly 1% following comments from Trump suggesting that the stock market will double in value [1] Group 1 - The Nasdaq index experienced a rise of more than 1% [1] - The Dow Jones and S&P 500 indices both increased by nearly 1% [1] - Trump's statement indicates a bullish outlook on the stock market, suggesting potential for substantial growth [1]