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Execution Aware A* for Cross Exchange Stablecoin Arbitrage
Proceedings of the The 39th Canadian Conference on Artificial Intelligence, PMLR 318:1186-1190, 2026.
Abstract
Cross-exchange cryptocurrency arbitrage enables low-risk profit from price discrepancies across exchanges, yet existing approaches employ negative cycle detection that targets opportunity identification rather than execution feasibility. We introduce an execution-aware pathfinding framework using A* search with domain-specific guidance heuristics, applied to stablecoins, a unique asset class exceeding $300 billion in market capitalization that bridges cryptocurrency and fiat currency, offering a novel dataset for arbitrage research. The problem is modelled as a weighted directed graph where nodes represent (exchange, stablecoin) pairs across 12 centralized exchanges and edges encode real-world costs including fees, slippage, gas, transfer delays, and exchange reliability. Three guidance heuristics and a multi-start strategy are evaluated over 7,200 search instances. Our slippage-aware heuristic h2 reduces node expansions by 29% relative to Dijkstra while matching its profit, demonstrating that domain-specific heuristics can meaningfully improve execution feasibility in real-time arbitrage planning. Code: https://github.com/kevinl03/Stablecoin-CrossExchange-Arbitrage.