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A two price theory of financial equilibrium with risk management implications

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Abstract

Financial primitives are introduced to define acceptable loss exposures when demands and supplies are defined on differing event spaces. Acceptable loss exposures are modeled by a convex cone of random variables containing the nonnegative random variables. The resulting financial equilibrium defines in general a two price economy. Analytical procedures for identifying the two prices are described. The size of the two price economy is fundamentally determined by the financial system that determines the size of the cone of acceptable losses. There are implications for accounting and risk management as liabilities would typically be valued at ask while assets are valued at bid with no data available on bidirectional prices for anything. Marking to market in such financial economies is at best marking to two price economies.

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Correspondence to Dilip B. Madan.

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Research on this paper was partially supported by a grant from the Committee on the Theory of Risk of the Casualty Actuarial Society. I also thank Peter Carr, Freddy Delbaen, Richard Derrig, Ernst Eberlein, Thomas Gehrig, Phil Heckman, Ajay Khanna, Wim Schoutens, J.J. Vicente Alvarez, and Shaun Wang for helpful discussions on the subject matter of this paper.

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Madan, D.B. A two price theory of financial equilibrium with risk management implications. Ann Finance 8, 489–505 (2012). https://doi.org/10.1007/s10436-012-0200-7

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