Shares of the world's leading chip designer are being propelled by the artificial intelligence (AI) revolution.Arm Holdings (ARM 4.61%) stock soared 118% in the first half of 2024. (Shares are up 141% through Friday, July 12.) That showing made the world's leading chip designer the second-best performer among semiconductor stocks with at least small-cap market caps (above $300 million). The top performer in this category was artificial intelligence (AI) chip leader Nvidia, whose shares skyrocketed 150% in t ...