Shares in Nvidia and other tech companies slumped after the computer chip maker said that tighter U.S. government controls on its exports of semiconductors used for artificial intelligence will cost it an extra $5.

President Donald Trump’s administration has barred Nvidia Corp. from selling its H20 chip to China, an escalation of Washington’s tech battle with Beijing that will cost the company billions of dollars and hamstring a product line it explicitly designed to comply with previous US curbs.

The AI darling, Nvidia revealed the curb of its sales to China could cost it $5.5 billion and sent its shares tumbling in after-hours trading as Reuters' Ramzan Karmali explains. Wire services including Reuters will no longer hold a permanent slot in the reporter pool.