Multi-Outcome NegRisk Arbitrage Scanning
Scans Polymarket for mispriced multi-outcome contracts that violate no-arbitrage bounds, enabling risk-free profits.
A production-grade Python asyncio scanner that automatically detects arbitrage opportunities across NegRisk (mutually exclusive, collectively exhaustive) multi-outcome markets on Polymarket. The bot continuously computes the sum of all outcome probabilities; if the total is significantly above or below 100%, it constructs a betting portfolio that guarantees a profit regardless of the outcome. For example, if Yes on three mutually exclusive events sum to 102%, it shorts all three; if 94%, it goes long all three. The scanner runs in paper-trading mode with 60 passing tests to ensure correctness. It includes a live browser dashboard for monitoring discovered arb opportunities. Execution requires fast order placement to avoid being front-run.