Why ASML Stock Jumped 86% in the First Half of 2026

ASML’s real earnings leverage is less about one quarter of AI enthusiasm and more about where the capex dollar is being allocated: toward a tighter set of critical bottlenecks with pricing power. That makes the stock structurally higher quality than most semiconductor names, but it also means the upside is usually captured through backlog, mix, and price discipline rather than explosive unit growth. The market may be underappreciating how much of the next leg comes from customers’ fear of falling behind at the leading edge, which supports utilization and ASPs even if end-demand is uneven.

The cleaner second-order beneficiaries are the equipment and materials names that sit adjacent to ASML’s tool installs, plus memory leaders that can monetize the shortage before supply normalizes. The loser, if this cycle extends, is downstream hardware assemblers and AI infrastructure vendors that depend on memory availability and cost stability; they may see margin pressure before demand weakens. That creates a subtle relative-value setup: semicap equipment should stay bid even if some AI hardware names merely meet expectations.

Near term, the key risk is valuation, not fundamentals. After a large rerating, ASML likely needs an upward revision to long-term revenue targets or a clear order acceleration to avoid multiple compression; mere confirmation is not enough. The thesis is falsified if 1-3 month order momentum slows, memory capex pauses, or China-related restrictions tighten further; over 6-18 months, the more important risk is that AI capex shifts from aggressive buildout to digestion, which would favor a rotation out of the entire equipment complex before it hits end-demand.