OpenAI IPO closing market cap above ___ ? — Odds & Predictions

5 markets · Total volume $1.5M · Live from Polymarket

Current favorite: Yes at 79.5% implied probability.

This market will resolve to “Yes” if the official closing price for OpenAI's market capitalization on its first trading day is above the listed value. Otherwise, it will resolve to “No”. If no IPO occurs by December 31, 2027, 11:59 PM ET, this market will resolve to “No”. Market capitalization is defined as the total number of outstanding shares multiplied by the closing share price on the first trading day. Resolution will be based on the primary exchange’s official listing page. In the event that the relevant figure is not displayed, another reliable source will be used. In the event of an interruption in the course of the normal trading session on OpenAI's first day of trading (e.g., a circuit breaker or half-day), the market will resolve according to the official closing price of the abbreviated session. If no such official closing price is published, the market will resolve according to the next trading day on which an official closing price is published, treating that as the first day of trading.

OpenAI IPO closing market cap above $800B?Yes — probability over time
79.5% 3.5 pts

OpenAI IPO closing market cap above $800B?

OutcomeImplied %Trade
Yes79.5%Bet
No20.5%Bet

OpenAI IPO closing market cap above $1T?

OutcomeImplied %Trade
Yes72%Bet
No28%Bet

OpenAI IPO closing market cap above $1.2T?

OutcomeImplied %Trade
Yes60%Bet
No40%Bet

OpenAI IPO closing market cap above $1.4T?

OutcomeImplied %Trade
No59%Bet
Yes41%Bet

OpenAI IPO closing market cap above $1.6T?

OutcomeImplied %Trade
No82.5%Bet
Yes17.5%Bet

FAQ

What are the current odds for OpenAI IPO closing market cap above ___ ??

As of the latest update, Yes is the favorite at an implied 79.5% probability on Polymarket. Full outcome odds are listed above.

How are these odds calculated?

These are prediction-market prices from Polymarket. Each outcome's price (0 to 100%) is the implied probability the market assigns, set by real money traded, not a bookmaker's margin-adjusted line.

Can I bet on these outcomes?

Yes. Polymarket lets you trade real money on each outcome. Use the links above to view and trade any market, where it is available in your location.

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