Ethereum MEV: Transaction Ordering, Arbitrage, and Liquidations
Summary
The document explains maximal extractable value (MEV) as revenue gained by changing which transactions enter a block and in what order. It describes how limited blockspace, public transaction data, and builders’ ability to choose transactions create opportunities for searchers to identify profitable actions and bid for inclusion. Priority gas auctions can drive up transaction costs for ordinary users, and MEV can benefit or harm users and the broader network.
Examples include atomic arbitrage across decentralized exchanges and liquidations of undercollateralized lending positions. The arbitrage example uses a flash loan to buy and sell across pools in one transaction, bringing prices closer together while earning a spread before fees. The document also discusses sandwich attacks and ways searchers reduce gas costs. These examples illustrate mechanisms rather than establish repeatable returns: profits depend on prices, fees, competition, and successful execution. The article is incomplete in places, and its account of MEV’s development and implications is introductory rather than a full assessment of mitigation or protocol effects.
Key ideas
- MEV comes from influencing transaction inclusion or ordering in a block.
- Searchers compete by bundling transactions and bidding for block inclusion.
- Atomic transactions can let arbitrageurs trade across pools while limiting execution risk.
- Liquidation bots can earn protocol incentives by closing unhealthy loans.
- Priority gas auctions and sandwich attacks can impose costs on users.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.