Power semiconductor stocks rise on strong NVIDIA Vera Rubin ramp outlook for late 2026 and 2027.

Power semiconductor stocks Wolfspeed, STMicroelectronics, and ON Semiconductor surged Monday following a Mizuho report highlighting a faster and stronger NVIDIA Vera Rubin ramp starting Q4 2026, driven by xAI and Meta. This ramp is expected to significantly increase power semiconductor content per data center rack, boosting demand for these companies' products. ON Semiconductor projects a rise in AI data center revenue and silicon carbide use, while STMicroelectronics and Wolfspeed also report strong growth and ambitious targets. Investors will watch ON Semiconductor's September Analyst Day and NVIDIA's quarterly update for confirmation of this ramp, which underpins the recent stock gains.