Back Running

Mechanism

Back running is a predatory trading strategy where an actor observes a pending transaction in a blockchain’s mempool and executes a new transaction immediately after it to profit from the resulting price movement. This technique exploits the public visibility of transaction data before it is included in a block. The back runner typically submits a transaction with a higher gas fee to ensure their order is processed directly following the target transaction, capitalizing on the price impact of the initial trade. This practice is a form of Maximal Extractable Value (MEV) extraction, specifically targeting large trades that cause significant price shifts in decentralized exchange liquidity pools.
Market Front-Running A visual representation of two distinct financial instruments intricately linked within a decentralized finance ecosystem.
AMMs
ZKPs
DEXs

Market Front-Running

Meaning ⎊ Market front-running exploits information asymmetry in decentralized transaction queues, allowing actors to profit from foreknowledge of price changes in underlying assets to trade options at favorable rates.