Applied Materials -6.7% led a wafer-fab-equipment selloff after its investor day skipped a spending forecast, while the power rung took the AI bid — Vistra +2.7%, Meta +2.6%.

Vistra (VST) led the compute basket Tuesday, up 2.7% to $162.36, with Meta (META) close behind at +2.6% to $762.50 — the two ends of the AI-capex chokepoint that still worked while the middle broke. The split from the prior session persisted: capital favored the hyperscaler buyer and the power supplier over the parts makers that sell into the buildout. Vistra's move was a continuation of the independent-power bid rather than a fresh catalyst — the structural driver remains the wave of nuclear-backed data-center supply deals, including Constellation's Google-backed 890 MW upgrade — and on Tuesday that bid stayed orderly: Constellation (CEG) +0.6% to $295.79, Talen (TLN) +0.6% to $382.14, GE Vernova (GEV) +0.7% to $1,004.04.

The laggard was Applied Materials (AMAT), down 6.7% to $464.24, and the cause was specific: at its investor day the company declined to put a number on industry wafer-fab-equipment spending, leaving investors without a benchmark for its growth case and prompting profit-taking after a stock that had run roughly 80% year-to-date. Because AMAT sits on the deepest-moat rung of the whole stack — the deposition and etch tools no leading-edge fab can source elsewhere — its stumble pulled the entire WFE chokepoint down: Lam Research (LRCX) -2.7% to $301.11, KLA (KLAC) -3.2% to $184.00, ASML -1.9% to $1,717.76. The derating was a valuation reset on the most defensible names, not a demand signal.

The memory and packaging rungs stayed soft for a third session, still digesting last week's CXMT denser-DRAM scare. Micron (MU) fell 3.6% to $953.19, metrology name Onto Innovation (ONTO) 3.7% to $263.55, and packaging-inspection play Camtek (CAMT) 3.3% to $142.78. Optics was mixed-to-weak — Fabrinet (FN) -6.3% to $427.82 and Applied Optoelectronics (AAOI) -2.9% to $97.78, though Marvell (MRVL) rose 1.1% to $268.73. The compute-infrastructure names that ride the same capex also slipped: CoreWeave (CRWV) -3.1% to $77.81 and Arista (ANET) -3.0% to $204.52. The tape, in short, repriced the suppliers while the demand side and the grid held.

The near-term calendar is thin on hard catalysts now that OCP Global Summit and SEMICON West — the venues where interconnect, packaging and tool roadmaps get set — wrap this week in the Bay Area. The next dated milestone with structural weight is the year-end window for Intel's 14A external-customer decision, the domestic-foundry validation the leading-edge rung is still waiting on. Until then, the equipment names trade on the WFE-spending question AMAT just left open.