US Approves H200 Chip Exports to China; NVDA Jumps 4.4%, AMD Down 3.3% on Samsung Jitters

In a striking reversal, the US Commerce Department approved sales of Nvidia's H200 AI chips to 10 Chinese companies, lifting a longstanding export restriction that had capped China's share of NVDA revenue at roughly 25% before the ban. The move was framed as part of broader US-China diplomatic normalisation following the Trump-Xi Beijing summit. NVDA shares jumped 4.4% on the announcement, reversing a week of consolidation. However, the sentiment among chip investors is mixed; the real question traders are asking is whether Chinese demand for US chips was already factored into valuations, or whether this represents a surprise margin windfall.

The timing coincided with a brief sell-off in semiconductor names driven by unrelated geopolitical noise: Samsung's weakness on North Korea tensions spilled into US futures, dragging AMD down 3.3% and pressuring NVDA and other chip names in premarket trade before the H200 approval lifted sentiment. The episode exposed fragility in the current semiconductor rally, which has been built on AI capex certainty and supply-chain tightness. If Chinese demand was underpriced, upside surprise; if it was already baked in, the move becomes a neutral-to-bearish confirmation of expectations.

Broadcasting agency commentary from supply-chain specialists suggests mixed implications. Arista Networks noted that AMD is likely to supply switches in 20-25% of AI deployments, up meaningfully from prior levels, but Broadcom chips may present capacity constraints elsewhere. The H200 approval may redirect some capex flows, but it does not materially change the aggregate spend cycle. Longer-term, the move signals that US-China tech decoupling is not a done deal, creating optionality for China-exposed chip vendors but also narrative risk if future administrations reverse course.

Semiconductor valuations are stretched despite recent gains; memory stocks in particular are expensive even as their price-to-earnings multiples have compressed. The H200 news may prove a catalyst for consolidation rather than a sustained ramp.