Arm Holdings (NASDAQ: ARM) shares rose after the company -- which sells critical design architecture for making semiconductors -- saw artificial intelligence (AI) demand boost its revenue. The stock, however, has still lost about a third of its value over the past year and it faces a big potential risk next fiscal year. Let's see what that is -- and what investors should do. AI powers results, but smartphone risk emerges After an initial dip following its results, Arm shares rallied as investors turned th ...