Anthropic IPO odds snap back to 79% for November

Traders put a listing by 30 November at 79%, while the 15 November contract trades at zero.

In one line: Anthropic's shares do not open for trading by 30 November. The listing slips into December or later, a delay the 79% price fails to allow for.

Polymarket traders put the chance of an Anthropic listing by 30 November at 79% on 7 November, up 19 points in the last 24 hours by the venue's own figure. The contract has swung hard all week. It stood at 77% on 31 October, rose to a high of 87% on 3 November, fell to a low of 48% on 6 November and then climbed 31 points off that low. Over the 7 days the net change is up 2 points.

The other contracts in the event mark out a narrow window. A listing by 15 November trades at 0%, by 20 November at 49%, by 15 December at 87% and by 31 December at 88%. Traders see almost no chance in the coming week, an even chance by 20 November and most of the remaining weight between 20 and 30 November. They add almost nothing for the second half of December. That reads as a belief that a listing which misses mid-December slips into next year.

The ladder looks like a book pricing a set date late in the month, and the week's swings show how little faith traders have that the date holds. The rule pays only if Anthropic shares are "listed on a public securities exchange and open for trading by 11:59 PM ET" on 30 November, so a delay of days, not a cancelled deal, turns the contract to No. A price that went from 87% to 48% and back to 79% between 3 and 7 November is reacting to timing risk, not settling it.

The call is that Anthropic lists, but not by 30 November, and 79% overrates the date. The best case against is the ladder itself: 0% for 15 November beside 49% for 20 November is what a fixed schedule looks like, and if Anthropic's filings set a first trading day before month-end, 79% is fair. The call is wrong if Anthropic shares open for trading on an exchange by 11:59pm ET on 30 November. The timing matters beyond the contract because the venue's market-cap contracts put only 21% on a first-day close below $1.25trn, so it decides when a company that traders mostly value above that mark first reaches public investors.