[U.S. Stock Market Close: Nasdaq and S&P 500 Hit New Highs Again, Multiple Storage Chip Stocks Surge to Record Highs] The three major U.S. stock indexes collectively closed higher, with the Nasdaq up 1.71%, the S&P 500 up 0.84%, and the Dow Jones up 0.02%. The Philadelphia Semiconductor Index rose over 5%. Among them, the Nasdaq and S&P 500 hit new highs again. Storage chip stocks led the gains, with Micron Technology up over 15% and Intel up over 13%, both reaching record highs.