[U.S. Stock Market Opens: Western Digital Down 19%, SanDisk Down 13%] BlockBeats News, August 6, according to BIT ((bit.com)) market data, the U.S. stock market opened with the Dow Jones up 0.14%, the S&P 500 index near flat, and the Nasdaq down 0.3%. The storage sector faced pressure, with SanDisk (SNDK.O) down 13%, Western Digital (WDC.O) down 19%, and SK Hynix (SKHY.O) down 7.8%.