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Polymarket Political Cross-Market Arbitrage

Arbitragescore 6found Jun 20, 2026github.com/nayrbryanGaming/arbiter

Hunts no-arbitrage violations between related political election markets on Polymarket and sizes positions with fractional Kelly.


This quant bot focuses on political prediction markets, identifying mispricings between related contracts (e.g., correlated election outcomes). It uses a process-first approach to detect no-arbitrage violations where the combined implied probabilities of mutually exclusive events exceed 1 or fall below 1. The bot sizes positions using fractional Kelly criterion to optimize growth while managing risk. It refuses to trade unless a backtested out-of-sample edge is confirmed, and operates in paper-trading mode by default to preserve capital. Implementation is Python-based, with a focus on survival over profit in the early stages.