Automated Market Making and Loss-Versus-Rebalancing

Jason Milionis, Ciamac C. Moallemi, Tim Roughgarden and Anthony Lee Zhang

Papers from arXiv.org

Abstract: We consider the market microstructure of automated market makers (AMMs) from the perspective of liquidity providers (LPs). Our central contribution is a ``Black-Scholes formula for AMMs''. We identify the main adverse selection cost incurred by LPs, which we call ``loss-versus-rebalancing'' (LVR, pronounced ``lever''). LVR captures costs incurred by AMM LPs due to stale prices that are picked off by better informed arbitrageurs. We derive closed-form expressions for LVR applicable to all automated market makers. Our model is quantitatively realistic, matching actual LP returns empirically, and shows how CFMM protocols can be redesigned to reduce or eliminate LVR.

Date: 2022-08, Revised 2024-05
New Economics Papers: this item is included in nep-mst
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