Anthropic market cap 1.8T or greater at IPO close priced at 42.5%

Anthropic’s Polymarket contract asking whether its market capitalization will reach at least $1.8T at the close of its IPO day was priced at 42.5%, down 23.5 probability points over 24 hours, with $269K traded. According to PredictionBubbles, the finance contract ranked as the day’s second-largest downward move.

A sharp repricing of the IPO threshold

The price puts the market-implied probability of meeting the valuation threshold below half. The contract concerns Anthropic’s market capitalization at the closing bell on its IPO day—not simply whether the company goes public.

The supplied material does not identify a company announcement or other catalyst for the decline. It also does not provide an IPO date or detailed settlement rules, limiting what can be concluded beyond the change in pricing.

How the ranking works

According to PredictionBubbles, the displayed snapshot used venue prices read on 17 Oct 2026, 13:38 UTC. The service refreshes every 15 minutes and compares prices over a 24-hour window, drawing from Polymarket and Kalshi.

Its ranking covers 2,000 markets lasting longer than 14 days and excludes markets without a valid day-old comparison. Changes are measured in probability points rather than relative percentages; trading volume and liquidity provide context but do not affect a market’s position in the ranking.

The $269K traded figure is therefore distinct from the 23.5-point decline. It describes trading activity, but the supplied information does not establish order-book depth or whether the repricing resulted from broad participation or concentrated orders.

What it means for prediction markets

• The threshold matters: The 42.5% price applies specifically to a market capitalization of at least $1.8T at the IPO-day close, not to Anthropic’s broader prospects.
• The move is not an explanation: The 23.5-point fall records a substantial change in pricing without establishing what caused it.
• Rank and liquidity are separate: Second-largest downward mover describes the size of the probability change within PredictionBubbles’ screened universe, not the contract’s trading depth.
• Timing matters: The figures reflect a particular snapshot on a board refreshed every 15 minutes, rather than a fixed assessment of the eventual outcome.