Equilibrium returns with transaction costs

We study how trading costs are reflected in equilibrium returns. To this end, we develop a tractable continuous-time risk-sharing model, where heterogeneous mean–variance investors trade subject to a quadratic transaction cost. The corresponding equilibrium is characterized as the unique solution of...

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Bibliographic Details
Published inFinance and stochastics Vol. 22; no. 3; pp. 569 - 601
Main Authors Bouchard, Bruno, Fukasawa, Masaaki, Herdegen, Martin, Muhle-Karbe, Johannes
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.07.2018
Springer Nature B.V
Springer Verlag (Germany)
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Summary:We study how trading costs are reflected in equilibrium returns. To this end, we develop a tractable continuous-time risk-sharing model, where heterogeneous mean–variance investors trade subject to a quadratic transaction cost. The corresponding equilibrium is characterized as the unique solution of a system of coupled but linear forward–backward stochastic differential equations. Explicit solutions are obtained in a number of concrete settings. The sluggishness of the frictional portfolios makes the corresponding equilibrium returns mean-reverting. Compared to the frictionless case, expected returns are higher if the more risk-averse agents are net sellers or if the asset supply expands over time.
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ISSN:0949-2984
1432-1122
DOI:10.1007/s00780-018-0366-6