After the U.S. stock market opened, gains expanded, with AMD (AMD.O) up 13% and SanDisk (SNDK.O) up 12%

According to MSX.COM data, the Nasdaq's gain expanded to 2%, and the S&P 500 Index rose 1.1%. The Philadelphia Semiconductor Index rose 6.8%, AMD (AMD.O) rose 13%, and SanDisk (SNDK.O) rose 12%.