Under Armour IncUAA.N lost 6.4% as the sports apparel maker saw its annual sales and profit below street expectations. By Shreyashi Sanyal, Shristi Achar A and Caroline Valetkevitch NEW YORK, May 9 (Reuters) - Major U.S. stock indexes were mostly lower on Tuesday afternoon as investors grew more cautious ahead of the U.S. consumer price index report, while disappointing forecasts from companies such as PayPal and Apple supplier Skyworks weighed on the mood. Investors are anxiously awaiting the Labor Department's consumer price index (CPI) report on Wednesday, and will look for clues on whether inflation is continuing to ease.