Maximum Extractable Value
Maximum Extractable Value, or MEV, represents the profit a validator or miner can make by strategically including, excluding, or reordering transactions within a block. This practice exploits the transparency of the mempool, where pending transactions are visible before they are finalized on the blockchain.
From a market microstructure perspective, MEV is essentially a form of automated arbitrage or front-running that occurs at the protocol level. While it can provide efficiency by correcting price discrepancies across decentralized exchanges, it often imposes hidden costs on regular users through increased slippage.
The extraction process relies on sophisticated bots that compete for priority, leading to gas price auctions. As a result, MEV has become a significant component of validator revenue, fundamentally altering the incentives within the ecosystem.