LONG-SHORT PORTFOLIO MODELING: CRITIQUE AND EXTENSION
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This study offers a critique of a recentIJTAFarticle by Charpin and Lacaze that formulates and solves a long-short portfolio selection problem. This study not only addresses some analytical issues arising from their model formulation but also provides a revised version and some properties of the corresponding efficient portfolios. Further, the revised formulation is extended to accommodate other practical features of long-short investing. This study is intended to enhance the usefulness of long-short portfolio modeling in practice.
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