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Polymarket traders see higher chances of OpenAI staying private through late 2027

Polymarket traders raised the chance that OpenAI does not hold an IPO by December 31, 2027 to 25.4 percent, up 5.5 points in 24 hours. The market has 104,000 dollars in lifetime volume and resolves on January 1, 2028.

Polymarket’s implied probability that OpenAI will not hold an IPO by December 31, 2027 reached 25.4 percent, according to PredictionBubbles. That represents a rise of 5.5 points in 24 hours.

Pricing shifts toward no IPO by the deadline

The update, published on Oct 31, 2026 at 8:30 AM ET, shows traders assigning greater weight to OpenAI remaining without an IPO through the specified deadline. The no-IPO outcome nevertheless remains below 50 percent.

PredictionBubbles reports 104,000 dollars in lifetime trading volume for the market. That figure covers activity over the market’s life, rather than just the 24-hour period in which the probability increased.

Deadline and resolution

The contract concerns whether OpenAI holds an IPO by December 31, 2027, with resolution scheduled for January 1, 2028. The supplied report does not identify a catalyst for the price movement or describe any change in OpenAI’s plans.

What it means for prediction markets

  • A shift, not a majority view: The 5.5-point increase brought the no-IPO probability to 25.4 percent, still below an even chance.
  • Volume has a different timeframe: The 104,000 dollars is lifetime volume and does not establish how much trading accompanied the latest move.
  • Timing defines the outcome: The market addresses an IPO by December 31, 2027—not whether OpenAI will ever go public.
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Sources & attribution

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    PredictionBubblespredictionbubbles.com
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    https://predictionbubbles.com
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