Shares of Advanced Micro Devices (AMD.US) surged over 7% at Tuesday's opening, trading at $156.65, while Nvidia (NVDA.US) gained more than 4% to $170.88. The rally follows Nvidia CEO Jensen Huang's confirmation that the company will commence sales of its H20 artificial intelligence chips to the Chinese market. Initial H20 shipments are expected to draw primarily from existing inventories, with the new B-series chips specifically designed for China anticipated to launch later this year. Separately, AMD announced plans to resume exports of its MI308 accelerators to China after receiving U.S. government approval.