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Polymarket (10)
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study critique (270)
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Mantic Monday: Groundhog Day

Scott examines prediction markets on Anthropic's Pentagon troubles (minimal impact expected), the 2026 midterms (Democratic wins likely despite voting law concerns), groundhog weather predictions (mostly broken clocks), Iran conflict outcomes (under 50% regime change), and introduces MNX, a new AI-focused futures exchange.

acx
Mar 3, 2026 5,499 words 230 likes 303 comments Listen · 31 min Read Read

Mantic Monday: The Monkey's Paw Curls

Scott reviews the state of prediction markets after explosive growth, finding that most volume is degenerate sports gambling rather than useful forecasting, and proposes both technical solutions and two potential futures for the field.

acx
Jan 13, 2026 6,449 words 211 likes 247 comments Listen · 36 min Read Read

Try The 2025 ACX/Metaculus Forecasting Contest

The 2025 ACX/Metaculus Forecasting Contest is now open, featuring 36 questions and a particular focus on comparing forecasting bots with human predictors.

acx
Jan 20, 2025 351 words 58 likes 41 comments Listen · 4 min Read Read

Congrats To Polymarket, But I Still Think They Were Mispriced

Scott Alexander praises Polymarket's election success but argues their Trump odds were mispriced, explaining why Trump's win doesn't significantly validate their numbers over other forecasters.

acx
Nov 7, 2024 2,993 words 248 likes 647 comments Listen · 18 min Read Read

Mantic Monday: Judgment Day

The post examines the spectacle of US elections, analyzes recent developments in prediction markets, and discusses various election-related forecasts and their implications.

acx
Nov 5, 2024 3,744 words 220 likes 469 comments Listen · 26 min Read Read

Mantic Monday 9/16/24

Scott examines a new AI forecaster, discusses Polymarket's success, and reviews recent developments in prediction markets and forecasting.

acx
Sep 17, 2024 2,631 words 79 likes 166 comments Listen · 18 min Read Read

Mantic Monday 3/14/22

Scott analyzes Ukraine prediction markets, nuclear war risk forecasts, and compares forecasters to experts, along with various updates on prediction platforms.

acx
Mar 14, 2022 2,456 words 54 likes 198 comments Listen · 23 min Read Read

Two Small Corrections And Updates

Scott offers corrections about Polymarket's status and updates on the 2022 prediction contest, including calls for collaboration and ideas.

acx
Feb 8, 2022 231 words 15 likes 14 comments Listen · 3 min Read Read

The Passage Of Polymarket

Scott examines the recent crackdown on Polymarket, critiques US policy on prediction markets, and discusses the future and potential of both prediction markets and cryptocurrency.

acx
Feb 7, 2022 2,918 words 104 likes 442 comments Listen · 20 min Read Read

Mantic Monday 6/21/21

Scott discusses various prediction markets and forecasting topics, including Metaculus predictions, Polymarket vs PredictIt, a study on forecasting accuracy, and the need for more precise inflation predictions from experts.

acx
Jun 22, 2021 1,447 words 51 likes 158 comments Listen · 15 min Read Read
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