The US stock market opened higher, with Joint Health rising 9.4% and Apple falling 0.3%

The three major stock indexes in the US opened higher, with the Dow Jones Industrial Average up 0.5%, the S&P 500 index up 0.28%, and the Nasdaq up 0.27%. Union Health rose 9.4%, and its first quarter financial report exceeded expectations. Amazon rose 2.1% as it upgraded its partnership with Anthropic. Apple fell 0.3%, Cook will step down as CEO, and Tenus will take over.