Apple just wrapped up its worst day on the stock market since April after reports surfaced about delays with Siri and as the company's news app faced regulatory scrutiny.The stock dropped 5% on Thursday, wiping out its gain for the year and leaving it down almost 4% in 2026.The long-awaited artificial intelligence update to the iPhone maker's Siri personal assistant has been internally pushed back to May and potentially later, Bloomberg reported Wednesday. The update was expected to launch withi...