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Will 9 Fed rate cuts happen in 2026?
24h Vol
$43.8K
Liquidity
$192.6K
Spread
0%
12/31/2026
View marketFinance
Polymarket market
Track live probability, outcome prices, volume, liquidity, and resolution details for OpenAI IPO closing market cap above $800B?. The market currently shows a live probability of 84%, $1.4K in 24h volume, and $6K in liquidity.
Probability
84%
24h Volume
$1.4K
Liquidity
$6K
This market is asking whether OpenAI’s first-day public-market valuation will finish above $800 billion, based on the official closing share price and the total shares outstanding. It is a straightforward threshold question, but one with major uncertainty because it depends on the size and pricing of a possible IPO, as well as how the stock trades on day one.
The event is tied to a potential OpenAI initial public offering, and the key test is whether the company’s closing market capitalization on its first trading day is above $800 billion. The market uses the official closing price on the primary exchange’s listing page, multiplied by the outstanding shares, and if no IPO happens by December 31, 2027, it resolves to No. If trading is interrupted or the first session is abbreviated, the rules say the official closing price from that session counts, or the next day with an official close if no close is published.
OpenAI is one of the most closely watched private companies in the world, so any IPO would draw heavy attention to how the market values its growth prospects, revenue potential, and AI leadership. The uncertainty here is not just whether OpenAI goes public, but also what price the market will assign to it at the close, which can differ sharply from private valuations or offering-day enthusiasm.
The main drivers are concrete IPO details: whether an offering is actually announced, how many shares are sold, the expected pricing range, and whether early demand suggests the stock could hold or exceed a very high opening valuation. The market can also move if OpenAI or its underwriters disclose a revised share count, a changed float, or timing information that affects how a first-day close above $800 billion would be calculated.
The current market price implies roughly a 84% chance for the leading outcome, based on live Polymarket pricing. That number is not a prediction from PredictionNinja and it is not a guarantee; it is the current crowd-priced view of the market and can change quickly when new information appears.
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24h Vol
$43.8K
Liquidity
$192.6K
Spread
0%
12/31/2026
View marketReaders should watch for an official IPO filing, any final pricing statement, and the exchange’s official closing price on the first trading day, since the resolution depends on that published figure rather than headlines or estimates. The most important details to verify are the total outstanding shares, the final close used for the first trading session, and whether any trading interruption changes which day counts as the first day of trading. If no IPO occurs before the deadline at the end of 2027, the market resolves to No automatically.
Track live probability, outcome prices, volume, liquidity, and resolution details for OpenAI IPO closing market cap above $800B?. The market currently shows a live probability of 84%, $1.4K in 24h volume, and $6K in liquidity.
Track live finance prediction markets focused on interest rates, inflation, stock market events, central bank decisions, and global financial forecasting trends.
Yes
83.5%
No
16.5%
This market is currently listed with an end date of Dec 31, 2027. Market timelines can change if the underlying event is postponed, rescheduled, or resolved early.
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.
Probability signal
The current price implies a strong favorite, so new information would need to be meaningful to move the market sharply.
Liquidity context
Liquidity is present but not especially deep, so spreads and order-book movement still matter.
Spread
The bid-ask spread is tight, which usually points to a more actively priced market.
Recent movement
The 24h move is modest, suggesting the market has not repriced dramatically in the latest feed.
The current displayed probability is 84%, based on the latest normalized Polymarket data available to PredictionNinja.
The rules and resolution criteria are pulled from the market description provided by Polymarket when available.
Prediction markets can move whenever traders react to new information, liquidity changes, injuries, announcements, news, or other event-specific developments.
No. PredictionNinja displays market data and context for research only. It is not financial, legal, betting, or investment advice.

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