Nvidia's share price falls after the company begins an investigation into CEO Jensen Huang's alleged relationship with a woman accused of being a Chinese spy.

SACHA PFEIFFER, HOST:

Shares in the chipmaker NVIDIA tumbled today. That's because the $4.3 trillion company said it is investigating its CEO, and that is due to allegations that he had a relationship with a woman suspected by U.S. intelligence of being a Chinese spy. NPR tech correspondent John Ruwitch is here to bring us up to speed. Hi, John.

JOHN RUWITCH, BYLINE: Hey, Sacha.

PFEIFFER: Tell us more about these accusations.

RUWITCH: Yeah. Yesterday, NVIDIA posted two announcements online. One said the board was investigating CEO Jensen Huang after reports that he was, quote, "the target of a foreign intelligence effort." The other was a memo from Huang himself admitting to having an affair and saying that he'd cooperate with the investigation. Now, The New York Times and others have been reporting that U.S. intelligence agencies believe that Huang became involved with a Chinese woman at a Singapore-based company called Megaspeed. That company was a customer buying NVIDIA chips.

Those reports, which NPR has not independently corroborated, said the woman was recruited by China's Ministry of State Security to spy on Huang or possibly try to influence U.S. policy. The New York Times has reported that Megaspeed was being investigated by the government for circumventing U.S. export controls and helping Chinese tech companies get access to restricted chips. I reached out to Megaspeed and haven't heard back, but the company has previously denied wrongdoing.