MEV refers to the profit that can be generated by reordering, inserting, or excluding transactions within a blockchain block.
Validators or block producers, along with sophisticated bots, can capture MEV by controlling or influencing transaction ordering.
While MEV cannot be eliminated entirely, users can reduce exposure by:
Trading bots continuously monitor the blockchain's mempool, where pending transactions wait to be confirmed.
When bots detect profitable opportunities, they submit transactions with higher fees to execute trades before or after target transactions.
This process happens in milliseconds and is not practical for manual traders.
MEV strategies vary in complexity, but common examples include:
A bot places a trade before a large transaction to benefit from the price movement it causes.
A bot executes a trade immediately after a large transaction to capture resulting price changes.
Bots exploit price differences between pools or exchanges.
MEV can negatively affect regular users by:
This impact is most noticeable during periods of high network activity.
MEV exists due to:
These features are inherent to many blockchain designs.
MEV and bot trading are natural outcomes of transparent blockchain systems. Understanding how they work helps traders make better decisions and manage execution risk.
This content is for educational purposes only. On-chain trading and DeFi protocols involve financial risk.