The board is reportedly conducting an independent investigation, while Nvidia shares plunged as much as 10% in after-hours trading.

The selloff pushed Nasdaq 100 futures down 0.9% and S&P 500 futures down 0.4%, reversing some of Wednesday's gains. The Nasdaq had climbed 1.6% in the previous session, supported by a 25% surge in CoreWeave shares following an upbeat business forecast.

The 10-year US Treasury yield hovered near 5% as strong October inflation and hawkish Fed remarks fueled expectations of further tightening. Governor Christopher Waller raised the possibility of a 50-basis-point hike in December, with markets pricing a 91% probability of an increase next month.

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