Decentralized prediction markets took 35 minutes to react to a massive public data leak that institutional markets caught in seconds.
April 25, 2026
Original Paper
Informational Inertia in a Decentralized Prediction Market: Evidence from the May 2024 CPI Leak
SSRN · 6642687
The Takeaway
The wisdom of the crowd is often touted as a faster, more efficient way to price information than traditional banks. A May 2024 leak of inflation data proved the opposite when the Polymarket platform remained oblivious for over half an hour. Professional traders at institutional firms reacted instantly, while the decentralized crowd failed to see the obvious news. This delay reveals a massive intelligence gap in decentralized finance systems. Relying on these platforms for real-time truth is dangerous because they lack the professional surveillance of established financial hubs.
From the abstract
On a day when major U.S. inflation data was literally already public, a market designed to price that very information took thirty-five minutes to notice. We exploit this rare natural experiment—the inadvertent 08:00 ET upload of the May 15, 2024 CPI report, thirty minutes before the scheduled release—to quantify informational inertia in a decentralized prediction market. Polymarket’s Fed rate-cut contracts exhibit zero abnormal movement during the thirty-minute information-asymmetry window and