Roughly 600,000 of Nvidia's H200 artificial intelligence chips are stockpiled in Hong Kong, awaiting shipment to mainland China while Beijing holds back approval for large-scale imports, according to Reuters reporting cited by Ad-hoc News. The stranded inventory has become the most concrete pressure point on the chipmaker as it heads into a crowded November.

Nvidia shares fell 9.26 percent on Thursday 5 November to $181.60 in a broad sell-off in AI stocks, then recovered 3.2 percent on Friday as chip shares bounced back. Rival AMD jumped 11 percent on Friday after losing more than 17 percent the day before, in a volatile week for the sector.

In Washington, three Republican committee chairmen have asked chief executive Jensen Huang to attend a joint closed-door briefing on 18 November. Brian Mast of the Foreign Affairs Committee, John Moolenaar of the Select Committee on China and Rick Crawford of the Intelligence Committee wrote to Huang on 4 November, asking him to explain his contacts with Alice Huang, a Megaspeed executive whom US intelligence agencies have identified as a Chinese intelligence asset, and to set out Nvidia's safeguards against foreign espionage.

Huang has until 11 November to accept the date or propose an alternative. Nvidia has said the contacts were routine business with a customer and that it does not share sensitive trade secrets or national security information. The briefing falls one day after Nvidia reports third-quarter results on 17 November, letting investors question management on China first. Melius Research analyst Ben Reitzes cut his price target to $315 from $420 on 2 November while keeping his buy rating. Reuters, citing the Financial Times, also reported that Nvidia has told data-centre partners to scale back their exposure to Chinese customers, a claim the news agency said it could not independently verify.