AI surge could thaw the market's de-equitisation shield

A Financial Times opinion argues that this bull market has ridden a de‑equitisation backstop—shrinking public equity supply via buybacks and privatisations. Now an AI boom, led by players like OpenAI, Anthropic and SpaceX, could bring sizable public-market supply as these firms explore IPOs with valuations potentially up to $4 trillion, possibly expanding the US equity base by about 6% and weakening the de‑equitisation ‘put’ that has supported prices. Meanwhile, Big Tech’s shift toward heavy AI investment is dampening buybacks, suggesting more public issuance could emerge in coming years.