[U.S. stock market opens, storage sector leads gains, SK Hynix and SanDisk up 4%] BlockBeats news, on October 21, according to BIT (bit.com) market data, the U.S. stock market opened with the Dow Jones up 0.3%, the S&P 500 index up 0.3%, and the Nasdaq up 0.7%. SK Hynix (SKHY) and SanDisk (SNDK) rose 4%, Micron Technology (MU) rose 3%, SpaceX (SPCX) rose 8%, and NVIDIA (NVDA) rose 2%.