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What Is a ‘Just-in-Time’ (JIT) Liquidity Provision Attack on an AMM?

A market maker temporarily deposits liquidity to capture a large trade's fees, then withdraws, extracting value from the user and other LPs.
Greeks.Live17.11.25

What Is a ‘Just-in-Time’ (JIT) Liquidity Provision Attack on an AMM?

A JIT attack involves a market maker observing a large incoming trade, quickly depositing liquidity to profit from the trade's fees, and then immediately withdrawing the liquidity. This action extracts value from the user's trade by temporarily monopolizing the fee, effectively harming long-term liquidity providers who are diluted and miss out on the fee.

Why Are Decentralized Exchanges (DEXs) Particularly Vulnerable to Price Manipulation?
How Does Payment for Order Flow (PFOF) Relate to MEV in Centralized and Decentralized Exchanges?
What Is JIT (Just-in-Time) Liquidity and How Is It a Form of MEV?
How Does the ‘Fee Structure’ Differ between a Centralized Exchange (CEX) and a Decentralized Exchange (DEX) AMM?

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