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The fundamental theorem of asset pricing, the hedging problem and maximal claims in financial markets with short sales prohibitions

Abstract : This paper consists of two parts. In the first part we prove the Fundamental Theorem of Asset Pricing under short sales prohibitions in continuous-time financial models where asset prices are driven by nonnegative locally bounded semimartingales. A key step in this proof is an extension of a well-known result of Ansel and Stricker. In the second part we study the hedging problem in these models and connect it to a properly defined property of "maximality" of contingent claims.
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Sergio Pulido. The fundamental theorem of asset pricing, the hedging problem and maximal claims in financial markets with short sales prohibitions. Annals of Applied Probability, Institute of Mathematical Statistics (IMS), 2014, 24 (1), pp.54-75. ⟨10.1214/12-AAP914⟩. ⟨hal-02265271⟩

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