[Probability of Anthropic IPO by October 31, 2026 drops to 3% on Polymarket, down 52% in a single week] PPP prediction market tool monitoring shows that the probability of Anthropic IPO on Polymarket by October 31, 2026 has dropped to 5%, down 50% in a single week; the probability of IPO by November 15, 2026 has dropped to 27%, down 41% in a single week. According to settlement rules, if Anthropic officially lists on a public securities exchange and opens stock trading by 11:59 PM Eastern Time on the specified date, the market will settle as Yes; otherwise, it will settle as No. Additionally, if Anthropic is acquired by an already listed company, the market will immediately settle as No. The primary basis for settlement in this market is official documents and announcements released by Anthropic and the stock exchange where its shares are listed. Join the PPP signal push community to stay ahead and seize opportunities.