Shares of Nvidia (NVDA 2.10%) tumbled after the company revealed that it will incur a $5.5 billion charge in the first quarter related to its H2O graphics processing units (GPUs) due to new export restrictions on the sale of its chips to countries like China. Nvidia's stock has had a tough start to 2025, with its share price down about 25% as of this writing. A dumbed-down version of its H100 and H200 GPUs, Nvidia's H20 chip was designed specifically to sell into the Chinese market to meet prior export cont ...