The consensus among forecasters on Polymarket, the only major prediction platform tracking this event, points to a 90% probability that OpenAI's market cap will fall short of the $1.25 trillion threshold at the close of its first trading day. With over $519,000 in volume wagered, the market reflects significant skepticism about the company's ability to command a valuation in that elite bracket, which would place it among the world's most valuable publicly traded firms.
No specific external trigger was identified in today's news flow to explain the current odds, which have held steady since the market opened. The absence of data from Kalshi and Manifold limits cross-platform comparison, but Polymarket's liquidity suggests informed traders are pricing in a more modest valuation. Analysts note that OpenAI's private valuation has fluctuated wildly in recent years, and the IPO market's volatility adds further uncertainty.
The 10% probability for a $1.25T–$1.5T range implies that traders see a roughly 1-in-10 chance of OpenAI hitting that mark, with the remaining 90% split between lower and possibly higher valuations. Without additional markets to break down those scenarios, the data primarily signals that a blockbuster IPO valuation in that specific range is not the base case.