Strategic Analysis of Just-In-Time Liquidity Provision in Concentrated Liquidity Market Makers

• URL: http://arxiv.org/abs/2509.16157v1
• Date: Fri, 19 Sep 2025 17:03:29 GMT
• Title: Strategic Analysis of Just-In-Time Liquidity Provision in Concentrated Liquidity Market Makers
• Authors: Bruno Llacer Trotti, Weizhao Tang, Rachid El-Azouzi, Giulia Fanti, Daniel Sadoc Menasche,
• Abstract summary: Just-In-Time (JIT) LPs are strategic agents who momentarily supply liquidity for a single swap.<n>This paper provides the first formal, transaction-level model of JIT liquidity provision for a widespread class of AMMs.<n>We show that JIT liquidity, when deployed strategically, can improve market efficiency by reducing slippage for traders.
• Score: 10.600927487191127
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Liquidity providers (LPs) are essential figures in the operation of automated market makers (AMMs); in exchange for transaction fees, LPs lend the liquidity that allows AMMs to operate. While many prior works have studied the incentive structures of LPs in general, we currently lack a principled understanding of a special class of LPs known as Just-In-Time (JIT) LPs. These are strategic agents who momentarily supply liquidity for a single swap, in an attempt to extract disproportionately high fees relative to the remaining passive LPs. This paper provides the first formal, transaction-level model of JIT liquidity provision for a widespread class of AMMs known as Concentrated Liquidity Market Makers (CLMMs), as seen in Uniswap V3, for instance. We characterize the landscape of price impact and fee allocation in these systems, formulate and analyze a non-linear optimization problem faced by JIT LPs, and prove the existence of an optimal strategy. By fitting our optimal solution for JIT LPs to real-world CLMMs, we observe that in liquidity pools (particularly those with risky assets), there is a significant gap between observed and optimal JIT behavior. Existing JIT LPs often fail to account for price impact; doing so, we estimate they could increase earnings by up to 69% on average over small time windows. We also show that JIT liquidity, when deployed strategically, can improve market efficiency by reducing slippage for traders, albeit at the cost of eroding average passive LP profits by up to 44% per trade.

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