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    Berlin: Humboldt University of Berlin, Interdisciplinary Research Project 373: Quantification and Simulation of Economic Processes
    Publication Date: 2018-11-06
    Description: Let Q be the set of equivalent martingale measures for a given process S, and let X be a process which is a local supermartingale with respect to any measure in Q. The optional decomposition theorem for X states that there exists a predictable integrand ф such that the difference X−ф•S is a decreasing process. In this paper we give a new proof which uses techniques from stochastic calculus rather than functional analysis, and which removes any boundedness assumption.
    Keywords: G10 ; G12 ; ddc:330 ; equivalent martingale measure ; optional decomposition ; semimartingale ; Hellinger process ; Lagrange multiplier
    Repository Name: EconStor: OA server of the German National Library of Economics - Leibniz Information Centre for Economics
    Language: English
    Type: doc-type:workingPaper
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