Key TakeawaysApple unveiled the new iPhone 16, the company's first phone designed for Apple Intelligence, on Monday. Apple stock has historically underperformed the market on iPhone launch days, a trend that continued Monday.Analysts believe the AI-powered iPhone 16 could drive a big upgrade cycle. Apple (AAPL) shares fell following the unveiling of the iPhone 16, Apple Watch Series 10 and AirPods 4. Shares of the tech titan's stock were down less than 1% following the much-anticipated "It's Glowtime" even ...