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What Is “Miner Extractable Value” (MEV) and How Does It Affect Arbitrage?

MEV is the profit miners (or validators in Proof-of-Stake) can earn by arbitrarily including, excluding, or reordering transactions within the blocks they produce. Arbitrage bots often pay high gas fees to be front-run or "sandwiched" by MEV bots, which can copy the profitable trade and execute it first.

This process significantly reduces the profitability of public arbitrage transactions.

What Is ‘Maximum Miner Extractable Value’ (MEV)?
What Is “Miner Extractable Value” (MEV) and How Is It Related to Front-Running?
What Is ‘Miner Extractable Value’ (MEV) in Relation to Transaction Ordering?
How Does Maximal Extractable Value (MEV) Relate to Front-Running in Decentralized Finance?