⚠ AI Concentration Is a Boom That Can BustHigh threat

The AI demand surge is TSMC's greatest tailwind and, in the same breath, a growing concentration risk. With high-performance computing and AI now roughly two-thirds of revenue, TSMC's fortunes have become heavily tied to the durability of a single, historically-unprecedented spending boom. AI capital investment by a handful of hyperscalers and chip designers is driving the demand, the capacity build-out, and the record margins — and that investment is running at a pace that has never been tested by a downturn. If AI spending digests, disappoints, or corrects, the segment that now dominates TSMC's revenue would cool, and the aggressive capacity TSMC is building for it could turn from scarce to surplus.

This is the same cyclical-concentration risk that runs through the whole business, sharpened to a point: TSMC is spending sixty billion dollars and more a year, largely to serve AI demand, on the assumption that the boom continues. The moat ensures TSMC captures essentially all of whatever AI-chip demand exists — no rival takes it — but the level of that demand is set by an AI investment cycle TSMC does not control, and history says such booms do not rise forever in a straight line. The AI surge has made TSMC's customer lock-in nearly absolute and its recent results spectacular; it has also concentrated an ever-larger share of the business in the most cyclical, most extrapolated, least-tested demand driver in technology. The tailwind is real and powerful — and the day it slackens, the two-thirds of revenue now tied to HPC and AI feels it first¹.