Nvidia Loses $430bn in Value as Law Firm Probes Spy Claims

Nvidia has shed $430bn in market value since allegations of espionage emerged, with a major US law firm now hired to investigate the claims, according to The Guardian's business live coverage. The scale of the decline marks one of the most severe single-stock risk events of the year and places the AI trade — and the broader US equity market — under renewed scrutiny. The involvement of a prominent US law firm signals the matter is being treated with serious legal weight, elevating the dispute from reputational noise into a formal investigation with potential regulatory and litigation consequences. For investors, the episode underscores how concentrated exposure to the AI theme has become: a company of Nvidia's size can transmit shockwaves across index-level portfolios, and the combination of espionage allegations and legal scrutiny introduces a risk category that earnings models do not capture. The precise nature of the claims and the law firm's findings have not been disclosed in the source reporting. What to watch next: any statement from the law firm or Nvidia on the scope of the investigation, official responses to the espionage allegations, and whether the sell-off deepens or stabilises as legal clarity emerges. Until then, headline risk remains the dominant driver of the stock.