Nvidia shares ended Thursday down 4.2 percent at $166.28, recovering much of their early losses after a wild day of trading triggered by the sudden resignation of chief executive Jensen Huang.

The stock opened at $150.99, down more than 13 percent from Wednesday’s close of $173.73, and fell as low as $148.80 in early trading — its lowest level since June 2025. It clawed back most of the drop through the day to close at $166.28, its lowest close since April, according to Barron’s.

At the lows, Nvidia’s market value briefly fell below $4 trillion for the first time since 2025, wiping out as much as $601 billion in a single session. The company’s value recovered to around $4.07 trillion by late morning.

Huang, who co-founded Nvidia in 1993 and led it for 33 years, resigned as president, chief executive and board member with immediate effect before the market opened on Thursday. The company gave no reason for his departure and included no comment from him in its statement.

Chief financial officer Colette Kress has been named interim chief executive, and board member Harvey Jones has become the company’s first chairman. Nvidia has begun a search for a permanent successor.

The resignation followed reports of two affairs involving Huang, one with a suspected Chinese spy, and reports that the board had been preparing to remove him. Seven brokerages downgraded the stock after the announcement.

Nvidia’s shares have now fallen about 35 percent from a record high hit in early October, and are down 15 percent in 2026 — on track for their worst year since 2022. Analyst Dan Ives has warned Huang’s exit could cut the company’s value by 25 percent.

The wider market held up better. The Nasdaq Composite rose 0.5 percent and the S&P 500 gained 0.4 percent, while a semiconductor exchange-traded fund rose 1.3 percent.

Investors now turn to Nvidia’s third-quarter results, due on Tuesday, November 17. Wall Street expects revenue of $108.84 billion, up 91 percent from a year ago, and earnings per share of $2.47.