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Arbitrage Alert: Building a Cross-Exchange Prediction Market Monitor with Python

This story is from 2026-10-23. It is preserved in the archive; the latest stories are on the live feed.

Introduction Prediction markets like Polymarket and Kalshi provide real-time probabilities for future events. On October 18, 2024, they priced the Fed's October rate decision four percentage points apart: Polymarket implied a 92% chance of a 25bp cut, while Kalshi showed 88%. Such discrepancies cre…

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  1. 2026-10-23 02:47 · DEV Community — AI
    Arbitrage Alert: Building a Cross-Exchange Prediction Market Monitor with Python

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