Anthropic IPO by Dec. 15, 2026 falls 17 points to 55.5% on Polymarket, on $207K traded

The Polymarket contract on whether Anthropic will complete an IPO by Dec. 15, 2026 fell 17 probability points to 55.5%, with $207K traded, in the Oct 16, 2026 snapshot published at 12:09 PM ET. According to PredictionBubbles’ live movers board, the contract ranked among the day’s biggest decliners.

A repricing of a specific deadline

The move reflects a lower market-implied likelihood of an Anthropic IPO by that particular cutoff. The contract is separate from markets covering IPOs before 2027 and from valuation contracts, so its price should not be treated as interchangeable with those books.

PredictionBubbles measures its movers over the preceding 24 hours in probability points, rather than percentage changes. The supplied material does not identify a company announcement or other catalyst behind the decline.

What the trading figures show

The $207K figure represents total traded volume, not necessarily money exchanged during the latest 24-hour move. According to PredictionBubbles, volume is distinct from both liquidity available on the order book and the value of positions that remain open.

PredictionBubbles aggregates 2127 open markets from Kalshi and Polymarket and refreshes prices every 15 minutes. The 55.5% reading is therefore a periodically updated market estimate—not confirmation of Anthropic’s listing plans or a guarantee of the outcome.

What it means for prediction markets

• The deadline matters: The Dec. 15, 2026 contract addresses a different question from IPOs-before-2027 and valuation markets.
• Direction is clear; the catalyst is not: The 17-point decline shows a substantial repricing, but the supplied reporting does not establish why it occurred.
• Volume has limits: $207K in cumulative trading does not establish current liquidity or how much activity accompanied the fall.