DeFi & Yield

What is MEV (maximal extractable value) in DeFi?

MEV, or maximal extractable value, is the profit that can be captured by choosing how transactions are ordered, included, or excluded within a block on a blockchain. Because validators and specialized actors decide sequencing, they can reorder pending trades to their advantage. For example, a bot might spot a large pending swap and place its own trades around it to profit from the resulting price move, a pattern often called a sandwich. MEV is a structural feature of public blockchains rather than a bug, and it can quietly raise the real cost of trading in DeFi. Understanding hidden costs is part of disciplined crypto thinking at Qatobit. Read our research.