Nvidia CEO Jensen Huang lost $6.47 billion in a single trading session on Monday as shares of the chipmaker fell 4.27 percent, pushing his fortune below $150 billion for the first time since April. The sell-off came as the company faced renewed scrutiny over allegations involving Huang and a businesswoman suspected by U.S. intelligence agencies of spying for China.

The decline, tracked by the Bloomberg Billionaires Index, reduced Huang’s net worth from $154.9 billion to $148 billion. Nvidia’s market capitalization also fell to $4.31 trillion, extending a difficult stretch for the world’s most valuable artificial intelligence computing company.

A $50 billion wealth decline

Huang’s latest loss brings his wealth decline since Oct. 5 to $50 billion, down from $198 billion to $148 billion. The decline reflects a more than 25 percent fall in Nvidia shares, which have dropped from nearly $240 to below $180 over the period, eroding the value of his stake.

The Nvidia co-founder derives most of his fortune from a 3.4 percent stake in the company, held directly and through family trusts, according to a September 2026 filing. The latest market decline underscores how closely his personal wealth remains tied to Nvidia’s valuation and investor appetite for artificial intelligence stocks.

Huang co-founded Nvidia in 1993 and helped transform it into a global semiconductor powerhouse. The company introduced its first graphics processing unit in 1999, laying the foundation for its expansion into artificial intelligence computing, where its processors have become essential infrastructure for companies developing and deploying advanced AI systems.

Nvidia opens independent probe

The setback comes as Nvidia’s board investigates reports concerning Huang’s relationship with Alice Huang, an executive at Megaspeed, a Singapore-based cloud computing and data center company. U.S. intelligence agencies have alleged that she passed information to Beijing, raising concerns about a possible foreign intelligence operation targeting the Nvidia chief executive.

Nvidia said its board had launched an independent investigation following reports that Huang was the target of a foreign intelligence effort. The company said Huang fully supported the review and had committed to cooperating with investigators, signalling that the matter would be examined through the board’s oversight process.

In an email to employees, Huang acknowledged personal misconduct and apologized for its impact on his family and professional responsibilities. He said he had fallen short of his obligations to colleagues, the board, business partners and shareholders, while accepting responsibility for the damage caused by his actions.

Huang acknowledges personal misconduct

“I was unfaithful to my wife. My actions hurt her and our children. There is no excuse for what I did. I am deeply sorry,” Huang said in the email, according to the reported account.

The allegations have drawn scrutiny beyond Nvidia’s financial performance, raising questions about its corporate governance and the potential implications of foreign intelligence concerns involving its chief executive. The investigation is expected to establish the circumstances surrounding the reports and determine whether they pose broader risks to the company.

China has rejected the allegations. Foreign Ministry spokesperson Guo Jiakun dismissed what he described as the so-called Chinese spy narrative as unsubstantiated,, pushing back against claims that Beijing was involved in an intelligence operation targeting Huang.