The US stock market opened higher and closed higher, with all three major indices rallying collectively. Both the Dow Jones and the S&P 500 indices reached new all-time highs. The Philadelphia Semiconductor Index surged by over 7%, with the optical communication and storage sectors demonstrating strong performance, and several related stocks posting significant gains. Notably, Palantir's stock price surged by over 29% as its second-quarter revenue far exceeded expectations and it raised its full-year revenue forecast.