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Replicating Market Makers

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arxiv 2103.14769 v1 pith:NXAM2X2P submitted 2021-03-26 q-fin.MF math.OCq-fin.TR

classification q-fin.MFmath.OCq-fin.TR
keywords payofffunctioncfmmconvexfunctionsmethodbasiccfmms
verification ladder T0 review T1 audit T2 compute T3 formal
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We present a method for constructing Constant Function Market Makers (CFMMs) whose portfolio value functions match a desired payoff. More specifically, we show that the space of concave, nonnegative, nondecreasing, 1-homogeneous payoff functions and the space of convex CFMMs are equivalent; in other words, every CFMM has a concave, nonnegative, nondecreasing, 1-homogeneous payoff function, and every payoff function with these properties has a corresponding convex CFMM. We demonstrate a simple method for recovering a CFMM trading function that produces this desired payoff. This method uses only basic tools from convex analysis and is intimately related to Fenchel conjugacy. We demonstrate our result by constructing trading functions corresponding to basic payoffs, as well as standard financial derivatives such as options and swaps.

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  1. Split the Yield, Share the Risk: Pricing, Hedging and Fixed rates in DeFi

    econ.TH 2025-05 conditional novelty 5.0 of 10

    A formal model prices DeFi yield tokens as discounted expected future yield and proposes utility-based market makers and a fixed-rate lending design on top.

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