Arm Holdings Plc (NASDAQ:ARM) stock jumped more than 14% after Bernstein upgraded the shares, analysts raised AI infrastructure spending forecasts and broader enthusiasm around AI-driven semiconductor demand boosted the sector.

Arm stock surged more than 10% in Wednesday morning trading, hitting a fresh 52-week high as Bernstein's bullish initiation, strong AI momentum, and optimism ahead of NVIDIA Corp (NASDAQ:NVDA) earnings fueled renewed investor demand for the stock.

PHLX Semiconductor Sector gained over 4% on Wednesday.

• ARM Holdings stock is approaching key resistance levels. What’s driving ARM to record levels?

Bernstein Initiation Boosts Arm Shares