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arxiv: 1006.3224 · v6 · pith:BSKAJJSTnew · submitted 2010-06-13 · 💱 q-fin.CP · math.AP· math.OC· math.PR· q-fin.PM

Outperforming the market portfolio with a given probability

classification 💱 q-fin.CP math.APmath.OCmath.PRq-fin.PM
keywords marketarbitragecolumbiaexistencefernholzfunctionkaratzaslocal
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Our goal is to resolve a problem proposed by Fernholz and Karatzas [On optimal arbitrage (2008) Columbia Univ.]: to characterize the minimum amount of initial capital with which an investor can beat the market portfolio with a certain probability, as a function of the market configuration and time to maturity. We show that this value function is the smallest nonnegative viscosity supersolution of a nonlinear PDE. As in Fernholz and Karatzas [On optimal arbitrage (2008) Columbia Univ.], we do not assume the existence of an equivalent local martingale measure, but merely the existence of a local martingale deflator.

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