OpenAI IPO valuation be between $1.25T and $1.5T priced at 20.6% on Polymarket, up 4.1 points, on $121K traded

OpenAI valuation band gains ground

Polymarket priced the prospect of OpenAI’s IPO valuation falling between $1.25T and $1.5T at 20.6%, up 4.1 probability points, with $121K traded, in the supplied market update published Oct 29, 2026, at 7:39 AM ET.

The move reflects a higher market-implied probability for that particular valuation range—not a forecast of OpenAI’s overall IPO valuation. The supplied material does not include prices for other valuation bands.

No fresh catalyst identified

The accompanying news scan reported no significant new platform headline in the preceding 30 minutes. Its search results resurfaced previously reviewed material, leaving no fresh reported development in the supplied update that clearly explains the repricing.

According to predictionbubbles.net, its movers board measures probability-point changes over 24 hours and refreshes every 15 minutes using venue prices. The provided snapshot was read from the venues on 29 Oct 2026, at 11:38 UTC. The outlet distinguishes price movement from trading activity: volume provides context, but does not determine a market’s position in its movement rankings.

What it means for prediction markets

• The change is in probability points: The 4.1-point rise measures the shift in the contract’s implied probability, not a 4.1% increase in OpenAI’s valuation.
• The signal is specific to one band: A 20.6% price concerns the $1.25T–$1.5T outcome. Without adjacent contracts, it does not establish whether traders broadly raised or lowered their valuation expectations.
• Volume alone cannot explain the move: The reported $121K traded does not reveal order-book depth or identify a catalyst. The supplied material also does not specify the volume’s measurement window.