Execution Latency Arbitrage

Execution latency arbitrage is a strategy where traders exploit the time difference between order submission and final on-chain settlement. In decentralized finance, this gap allows high-frequency participants to observe pending transactions in the mempool and front-run them.

By paying higher gas fees, these actors ensure their trades are processed before the original user's transaction, effectively stealing the expected price improvement. This practice undermines the fairness of decentralized order execution and forces users to account for hidden costs beyond standard trading fees.

It is a direct result of the inherent latency in blockchain consensus mechanisms compared to centralized matching engines. Mitigating this requires advanced order-sequencing protocols or private transaction relays to shield orders from public mempool visibility.