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Polymarket odds of OpenAI exceeding trillion-dollar IPO valuation slip to 64.5 percent

No significant new platform headline in the last 30 minutes; news search recirculated only items already used, held out or web-held on Oct. 30–31 (the Polymarket…

OpenAI IPO pricing slips

Polymarket’s market on whether OpenAI’s IPO closing market capitalization will exceed $1T was priced at 64.5%, down 8.5 percentage points, in the supplied snapshot published Oct 31, 2026 · 10:24 AM ET.

The market had recorded $1.1M in trading volume. Pricing remained above 50% despite the decline, leaving the above-$1T outcome favored in the snapshot.

No fresh catalyst identified

The accompanying summary reported no significant new platform headline in the preceding 30 minutes. It said news searches had resurfaced only material already used, held out or web-held on Oct. 30–31.

No source links or full reporting were provided. The available material therefore does not establish what drove the price change, or specify the period over which the 8.5-point decline occurred.

What it means for prediction markets

  • Lower pricing, still above even odds: The 64.5% reading reflects a retreat in the market’s assessment of an IPO closing capitalization above $1T, not a shift below 50%.
  • Volume does not explain the move: The $1.1M traded provides an activity measure, but the supplied material does not identify the trades or catalyst behind the decline.
  • The information gap matters: With no significant new headline identified in the latest 30-minute window, attributing the move to a particular news development would be unsupported.
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Sources & attribution

Published
  1. Source
    Polymarketpolymarket.com
    Publisher
    https://polymarket.com
    Source URL
    The feed did not publish this story's article address.

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