The artificial intelligence (AI) revolution has created outsize wealth for growth investors over the last several years. But one of its biggest winners is suddenly facing a crisis. Nvidia (NVDA -5.37%) stock plunged more than 12% during morning trading on Nov. 12 following news that longtime CEO Jensen Huang is stepping down.

The announcement follows reports concerning Huang’s relationships with an executive at Nvidia as well as a businesswoman suspected of ties to Chinese intelligence. Nvidia’s board of directors had launched an investigation into the matter.

CFO Colette Kress will serve as interim CEO while the company evaluates a more permanent successor. I think Nvidia’s troubles could become the catalyst for a broader stock market…