According to the source, researchers report that pricing inefficiencies on Polymarket allow traders to lock in guaranteed profits by buying both sides when the combined cost of YES and NO is below $1, creating risk-free arbitrage windows. source: the provided source; Hanson 2003. Researchers also indicate similar mispricings may occur across other event-betting platforms, suggesting cross-platform arbitrage opportunities for crypto-native market makers. source: the provided source; Wolfers and Zitzewitz 2004. For trade execution, monitor markets where YES+NO deviates from $1 and adjust for transaction costs and slippage that can eliminate the edge, as documented in prediction-market microstructure research. source: Wolfers and Zitzewitz 2004; Othman, Pennock, and Sandholm 2010.