Semiconductor stocks fell sharply on Monday amid worries that companies in China are using workarounds to get the latest offerings from Nvidia (NASDAQ:NVDA) and President Trump's announcement that tariffs will go into effect tomorrow on Canada and Mexico.

Nvidia faces continued concerns about potential restrictions on exports of its AI hardware amid reports that advanced chips are reaching China despite U.S. sanctions.

Key Takeaways Shares of Nvidia were down 10% Monday afternoon, falling into bear market territory. The company's latest quarterly financial results raised questions about what was next for the stock—and the AI trade—and uncertainty driven by US trade policy has further concerned investors.