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📖 The ACX 2025 Prediction Contest Is Open!

The Astral Codex Ten Prediction Contest is back with an expanded $10,000 prize pool! Test your forecasting skills across geopolitics, technology, economics, and more with questions curated by Scott Alexander. Make your predictions by January 31 to compete.

🔭 The Bridgewater x Metaculus Forecasting Contest Goes Global — Feb 3

For the second year, Metaculus is teaming up with Bridgewater Associates to host a competition featuring $25k in prizes and potential opportunities with the asset management firm — and this year, forecasters from around the globe can compete.

Start here to register for the February 3rd competition, warm up on practice questions, and learn about the separate Open and Undergraduate leaderboards.

Leaderboards
Peer Accuracy
Peer Accuracy measures how accurate a user was compared to others. Users are ranked by the sum of their Peer scores, divided by the sum of their Coverages. This creates a weighted average, where each prediction is counted proportionally to how long it was standing. To reduce the impact of luck, all forecasters start with a prior of 30 questions with a score of 0. Learn more here.
We sometimes recruit upstanding members of the community who are excellent question writers to become paid moderators.
Fill out our expression of interest form if you would like to be considered.
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The Peer Accuracy leaderboards used slightly different math before 2024. See details here.