What it means
Maximal extractable value: profit that block builders or bots make by reordering, adding or leaving out transactions.
A common case is a sandwich: a bot sees your pending trade, buys just before you and sells just after, so you get a worse rate.
How it works
Setting a tight slippage limit and using protected routes reduces it.
Related terms
| Term | What it means |
|---|---|
| Slippage | The difference between the rate you see and the rate you get, because the price moved before the trade settled. |
| Mempool | The waiting room for transactions that have been sent but not yet added to a block. |
| DEX | Decentralised exchange: smart contracts that let you trade tokens straight from your own wallet, with no company holding your money. |
This glossary explains terms in general. It isn't investment, tax or legal advice.