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arXiv 2011.02979math.OCmath.PR
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有执行风险的清算问题的最优解

Optimal solution of the liquidation problem under execution risk

Lorella Fatone, Francesca Mariani

摘要:

我们考虑一个连续交易的投资者,并希望在规定的时间间隔内清算初始资产头寸。在执行清算令期间,投资者面临执行风险。我们研究的问题,找到最优的清算策略,投资者采取,以最大限度地提高预期收益所产生的清算。我们提出了一个清算问题的数学模型,该模型扩展了Almgren和Chriss的模型(Almgren,R.,克里斯,N.,投资组合交易的最优执行,风险杂志,2000年),以包括执行风险。清算问题被建模为一个线性二次随机最优控制问题有限的时间,并在一定的假设下,显式求解。

英文摘要:

We consider an investor that trades continuously and wants to liquidate an initial asset position within a prescribed time interval. During the execution of the liquidation order the investor is subject to execution risk. We study the problem of finding the optimal liquidation strategy adopted by the investor in order to maximize the expected revenue resulting from the liquidation. We present a mathematical model of the liquidation problem that extends the model of Almgren and Chriss (Almgren, R., Chriss, N., Optimal execution of portfolio transactions, Journal of Risk, 2000) to include execution risk. The liquidation problem is modeled as a linear quadratic stochastic optimal control problem with finite horizon and, under some hypotheses, is solved explicitly.

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