Apple Inc. (AAPL.O) shares rose approximately 3% in pre-market trading on May 1, following unexpectedly strong revenue guidance for the current quarter. According to Jin10, Apple's revenue in China continued to grow by double digits last quarter, with iPhone sales reaching a record high for the same period. Meanwhile, SanDisk (SNDK.O) and Western Digital (WDC.O) saw their shares fall by about 5% and 7%, respectively, despite both companies providing guidance that exceeded expectations. Analysts noted that the strong performance had already been priced in, and the guidance lacked sufficient surprise.