Polymarket traders are betting heavily against OpenAI achieving a market cap between $1.25 trillion and $1.5 trillion at the close of its first trading day, with the contract pricing an 11% probability for that range. This implies an 89% expectation that the company will be valued below $1.25 trillion—or possibly above $1.5 trillion, though the latter scenario is not directly captured by this binary contract. The market has attracted $521,000 in volume, indicating significant interest in the outcome.
The single-platform data from Polymarket offers a focused but limited view, as no comparable contracts exist on Kalshi or Manifold for this specific range. The 11% probability reflects a consensus among traders that OpenAI's IPO valuation will likely land below the $1.25 trillion mark, potentially due to regulatory scrutiny, competitive pressures from rivals like Anthropic and Google DeepMind, or broader market conditions for tech IPOs. No specific external trigger was identified in today's news flow to explain the current odds.
While the contract does not specify a lower bound, the low probability for the $1.25T–$1.5T range suggests traders expect a valuation either significantly lower or, less likely, higher. Given OpenAI's private valuation of around $80 billion in its latest funding round, a $1.25 trillion IPO would represent a roughly 15-fold increase, a leap that markets appear skeptical about achieving on day one.