ARCIPEDIA · DEFI

Plain English

MEV stands for Maximal Extractable Value — the profit a validator (or sophisticated bot operating with one) can capture by reordering, inserting, or censoring transactions within a block. The classic example: front-running a large DEX swap by inserting your own trade just before it, profiting from the price movement.

How it actually works

Because validators choose what transactions go into a block and in what order, they have economic leverage over the transactions in their pending mempool. “Searchers” (specialized bots) submit bundled transactions paying validators a tip to be included with specific ordering. MEV includes sandwich attacks (front-run + back-run a victim’s swap), arbitrage between pools, and liquidations.

What it means for you

For members trading on DEXes, MEV is a hidden cost. Aggregators with MEV protection (CowSwap, 1inch Fusion), private mempools (Flashbots), and slippage management all mitigate the damage. For passive holders, MEV is mostly invisible.

How ARCrypto teaches this

We teach MEV-aware execution: how to use protected order routing, why timing of transactions matters, and how to spot when an MEV event has cost you real money on a trade.

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Educational content only. Not investment, tax, or legal advice.