SK Hynix — the primary HBM supplier to Nvidia's H-series GPUs — slumped, triggering a broad sympathy selloff across U.S. AI chip names led by Nvidia (NVDA), Broadcom (AVGO), and AMD. The read-through is straightforward: if HBM demand were accelerating, Hynix wouldn't be under pressure, so the market is pricing in at least a near-term pause in AI hardware orders.
The three names caught in the move are not equals. Nvidia posted $215.9B in revenue growing 65.5% YoY with a 71.1% gross margin and $4.90 diluted EPS — a financial profile that reflects dominant pricing power in AI accelerators. Broadcom's $63.9B top line grew 23.9% YoY at 67.8% gross margins, underpinned by its custom ASIC (XPU) business serving hyperscalers directly. AMD, with $34.6B in revenue up 34.3% YoY, carries a noticeably thinner 49.5% gross and 12.5% net margin, reflecting heavier competition and lower AI revenue mix than the other two.
The bull case rests on the idea that HBM supply constraints — not demand softness — are Hynix's real problem, and that Nvidia's Blackwell ramp cycle is still in early innings with $4T+ in hyperscaler capex commitments publicly on record. Broadcom's custom silicon business insulates it from GPU cycle timing, and AMD's MI300X is still gaining enterprise traction.
The bear case is that memory suppliers historically see demand shifts before GPU vendors do, and any pause in hyperscaler ordering ripples quickly into this concentrated supply chain. AMD is most exposed given its thinner margins, smaller AI revenue base, and the fact it's still winning share — meaning it has the most to give back if the cycle stalls. NVDA and AVGO, with superior margin structures, are better positioned to absorb a correction but are not immune.
The key things to watch: Hynix's earnings commentary on HBM order visibility, any revision to hyperscaler capex guidance from Microsoft, Meta, Alphabet, or Amazon in upcoming prints, and whether NVDA's next earnings guide shows any deceleration. Until those datapoints land, the selloff is signal-but-not-confirmation.