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Explicit Solution for Constrained Optimal Execution Problem with General Correlated Market Depth

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Abstract

This work studies the constrained optimal execution problem with a random market depth in the limit order market. Motivated from the real trading activities, our execution model considers the execution bounds and allows the random market depth to be statistically correlated in different periods. Usually, it is difficult to achieve the analytical solution for this class of constrained dynamic decision problem. Thanks to the special structure of this model, by applying the proposed state separation theorem and dynamic programming, we successfully obtain the analytical execution policy. The revealed policy is of feedback nature. Examples are provided to illustrate our solution methods. Simulation results demonstrate the advantages of our model comparing with the classical execution policy.

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Notes

  1. Note that \(p_k\) is the price before the trading happens at stage k.

  2. By using this model, the filtration \(\mathcal {F}_k\) can be specified as the sigma-algebra generated by the realization of the random variables until time \(k-1\), i.e., the realizations of \(\theta _0,\varepsilon _0\), \(\theta _1, \varepsilon _1, \cdots , \theta _{k-1}, \varepsilon _{k-1}\).

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Correspondence to Jian-Jun Gao.

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This paper is dedicated to Professor Duan Li in celebration of his 65th birthday.

This research is partially supported by the National Natural Science Foundation of China (No.61573244).

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Wu, WP., Gao, JJ. Explicit Solution for Constrained Optimal Execution Problem with General Correlated Market Depth. J. Oper. Res. Soc. China 6, 159–174 (2018). https://doi.org/10.1007/s40305-018-0197-3

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  • DOI: https://doi.org/10.1007/s40305-018-0197-3

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