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GlossaryJJust-In-Time Liquidity Attacks

Just-In-Time Liquidity Attacks

A MEV strategy where liquidity is added and removed around a large trade to extract profits at the expense of regular providers.

What is Just-In-Time Liquidity Attacks?

Just-In-Time (JIT) liquidity attacks involve spotting a pending swap in the mempool, minting concentrated liquidity in a tight range before it, and burning it after, capturing fees while avoiding impermanent loss. On Uniswap v3, this generated $750 billion in liquidity event volume by 2023.

Primarily executed by a few bots in a “whales’ game,” JIT crowds out passive LPs when order volume isn’t elastic, leading to a tragedy of the commons.

Strategic analysis shows JIT can combine with sandwich attacks, extracting up to 2% per trade, but enhances efficiency for uninformed orders.

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