https://www.theguardian.com/technology/2025/apr/16/nvidia-expects-to-take-55bn-hit-as-us-tightens-ai-chip-export-rules-to-china > Shares plunge as firm says H20 chip, designed for Chinese market to comply with controls, will now need special licence > Nvidia has said it expects a $5.5bn (£4.1bn) hit after Donald Trump’s administration barred the chip designer from selling crucial artificial intelligence chips in China, sending shares in one of the US’s most valuable companies plunging in after-hours trading.