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His accounts bought Nvidia shares after he was warned about its chief executive and before his government cleared Chinese buyers. Democrats are investigating the approvals and have demanded he explain the trades.
Directors vouched for him on 8 November and accepted his resignation three days later. The chair they then appointed has served alongside him since 1993 and sits on the committees responsible for Nvidia's compliance inquiries.
An FBI investigation is examining his relationship with Alice Huang, a suspected Chinese agent whose company Nvidia made a partner under his leadership and which he defended in public. What he knew of her activities has not been established.
Jensen Huang negotiated Nvidia's China deals directly with the president. Public filings record the money, the meetings and the approvals. They do not show that any of them were exchanged for another.
Investigators were told to clear all Nvidia contact through Under Secretary Jeffrey Kessler. The department has not said who gave that order, on what authority or whether it slowed the case.
Nvidia CEO Jensen Huang admits an affair with Alice Huang, whom US intelligence officials suspect of spying for China. The allegations have prompted a board investigation and congressional demands for answers.
