美股三大股指集体高开，纳指涨0.47%，美光科技涨超5%

Group 1 - The U.S. stock market opened positively with all three major indices rising: Dow Jones up 0.11%, Nasdaq up 0.47%, and S&P 500 up 0.22% [1] - AST SpaceMobile, a U.S. satellite communications company, surged by 6.2% after confirming its qualification as the main contractor for the U.S. Missile Defense Agency's "SHIELD" project [1] - ASML increased by 1.6%, with Morgan Stanley projecting a potential 70% rise as chip manufacturers ramp up spending to meet soaring AI demand [1] - Micron Technology saw a gain of over 5%, following the purchase of 23,200 shares of common stock by board member Teyin Liu, totaling approximately $7.8 million [1]