[U.S. Stock Market's Three Major Indexes Open Higher, Nasdaq Up 1.5%, Semiconductor Stocks Rally] BlockBeats News, September 17, according to BIT((bit.com)) market data, the three major U.S. stock indexes opened higher collectively, with the Dow Jones up 0.9%, the S&P 500 Index up 1.2%, and the Nasdaq up 1.5%. Semiconductor stocks rallied across the board, with the Philadelphia Semiconductor Index up nearly 3%, Qualcomm up about 3%, and Intel up about 5%. Memory chip stocks saw broad gains, with SK Hynix up about 5%. Optical communication stocks also rose broadly, with Marvell Technology up about 5%.