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Science and Technology
OpenAI IPO closing market cap above ___ ?
polymarket

OpenAI IPO closing market cap above ___ ?

Jan 30, 2026, 7:27 PM EST - Dec 31, 2027, 11:59 PM EST
Total volume:
$1,568,569
Volume 24h:
$446
44%
Liquidity:
$13,232
7%
Open interest:
$24,536N/A

$800B

 - Polymarket

$800B - Polymarket

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolves Dec 31, 2027

OpenAI IPO closing market cap above $800B?

73%chance
Amount

$

Trade on
polymarket

Trade on Polymarket

At 73.5¢ buys you 136 shares | Odds: 73% Total Payout: $136 | Net Profit: $36 Multiplier: 1.36x | ROI: 36% | APY: 30% 430 days to resolution
You will be redirected to the platform to complete this trade.
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
polymarket

$800B

Trade
73%
1%
Yes 73.5¢No 27.9¢
1.4¢
$4,724
$128,860
0.04%
2%
N/A
1y 2mo
active
polymarket

$1T

Trade
68%
1%
Yes 70¢No 34¢
4¢
$3,633
$1,058,223
0.01%
0.1%
N/A
1y 2mo
active
polymarket

$1.2T

Trade
50%
8%
Yes 71¢No 72¢
43¢
$2,092
$250,702
0%
0.03%
N/A
1y 2mo
active
polymarket

$1.4T

Trade
46%
4%
Yes 48¢No 56¢
4¢
$749
$74,479
0.23%
1%
N/A
1y 2mo
active
polymarket

$1.6T

Trade
36%
5%
Yes 42¢No 70¢
12¢
$1,862
$56,304
0.27%
2%
N/A
1y 2mo
active
polymarket

$1.8T

Trade
37%
17%
Yes 70¢No 97¢
67¢
$94
N/A
N/A
N/A
N/A
1y 2mo
active
polymarket

$2T

Trade
39%
19%
Yes 74¢No 97¢
71¢
$78
N/A
N/A
N/A
N/A
1y 2mo
active
Total markets: 7

Intro

This market tracks the probability of OpenAI’s initial public offering (IPO) closing with a market capitalization above $800 billion. Currently, the leading outcome – that OpenAI’s IPO *will* exceed this valuation – is trading at 92.0% on Polymarket. Resolution will be based on the official closing price from the primary exchange’s listing page, as defined in the resolution source. Keep a close watch on whether OpenAI initiates its IPO process, as this market will resolve to “No” if no IPO occurs by December 31, 2027, 11:59 PM ET.

Polymarket

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.

Frequently asked questions

On Polymarket, the dashboard for the OpenAI IPO market tracks the current odds of the IPO closing above a certain market capitalization. You'll find a price history chart showing how the probabilities have shifted over time, along with the 24-hour trading volume, currently at $446. The total volume traded on this market is $1,568,569, indicating the level of interest and speculation surrounding the OpenAI IPO. This information allows traders to assess market sentiment and make informed decisions about their positions.

Currently, the prevailing sentiment in this market suggests a high probability that the OpenAI IPO will close with a market cap above the threshold. This contrasts with some initial analyst forecasts, which were more conservative. However, it’s important to note that analyst predictions are often based on traditional valuation methods and may not fully account for the hype and investor enthusiasm often seen with highly anticipated tech IPOs. The collective wisdom of traders on Polymarket seems to be leaning towards a more optimistic outcome for the OpenAI IPO.

On Polymarket, this market is priced through a continuous auction mechanism where traders buy and sell shares representing their belief about the outcome. The price of a share directly reflects the probability of the IPO closing above the specified market cap. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. As more traders participate, the price adjusts to reflect the aggregated sentiment. Currently, the top outcome – the IPO closing above the threshold – has a chance percentage of 72.8% and the volume traded on that outcome is significant, demonstrating strong conviction among traders.

This market resolves around Jan 1, 2028, with the outcome confirmed once the event is verifiable from credible public reporting. The resolution will be based on the closing market capitalization of OpenAI on its IPO date, as reported by a widely recognized financial data source. Traders should monitor news and financial reports leading up to the resolution date to stay informed about any developments that could impact the outcome of this market. The final price will determine whether the 'above' outcome wins or not.

Several factors could significantly influence this market. Any news regarding OpenAI’s financial performance, regulatory approvals for the IPO, or overall market conditions could cause shifts in trader sentiment. Unexpected announcements about the IPO’s pricing or the number of shares offered would also be major catalysts. Broader economic indicators, such as interest rate changes or inflation data, could also indirectly affect the market. Positive or negative press coverage surrounding OpenAI’s technology or leadership could also move this market considerably.