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arXiv 1707.08464q-fin.PMmath.PR
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有交易成本的均衡收益

Equilibrium Returns with Transaction Costs

Bruno Bouchard, Masaaki Fukasawa, Martin Herdegen, Johannes Muhle-Karbe

摘要:

我们研究交易成本如何反映在均衡收益中。为此,我们开发了一个易处理的连续时间风险分担模型,其中异质均值-方差投资者交易服从二次交易成本。相应的平衡点被刻画为一个耦合但线性的正向-倒向随机微分方程系统的唯一解。在一些具体的设置获得显式的解决方案。摩擦投资组合的滞后性使得相应的均衡收益率均值回复。与无摩擦的情况相比,如果风险厌恶程度更高的代理人是净卖家,或者资产供应随着时间的推移而扩大,则预期收益率更高。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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