Why Is Arm Holdings (ARM) Stock Price Up 17.36% Today, August 4? AI Demand and Chip Rebound Restore Risk Appetite

Arm (ARM) surged 17.36% as investors re-priced its AI infrastructure exposure, citing recently reported data-center royalties that more than doubled and expanded AGI CPU demand indications. The move also reflected a broad semiconductor risk-on rebound rather than a same-day company catalyst, implying flow-driven volatility. Near term, positioning is likely to track chip-sector breadth and follow-through evidence that AI and data-center momentum is sustaining.