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arXiv 1502.04521q-fin.TRq-fin.CP
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随机价格恢复下的动态最优执行策略

A dynamic optimal execution strategy under stochastic price recovery

Masashi Ieda

摘要:

本文研究了基于限价订单簿动态的价格随机恢复下的最优执行问题。我们通过加速补充订单的到达来模拟执行大订单后的价格恢复,这被定义为一个Cox过程,其强度随着市场冲击的程度而增加。我们不仅包括市价订单,而且还包括限价订单在我们的战略在一个有限制的方式。我们制定的问题作为一个组合的随机控制问题在有限的时间范围内。数值求解了相应的Hamilton-Jacobi-Bellman拟变分不等式。所得到的最优策略由三个部分组成:(i)初始大宗交易;(ii)期间的计划外小额交易;(iii)终端大宗交易。交易的规模和时间由市场冲击的容忍度决定,这取决于每个时间步的状态,因此策略的行为是动态的。我们还提供了竞争力的结果,由于包括限价订单,即使一个限价订单是允许保守的执行价格的评估。

英文摘要:

In the present paper, we study the optimal execution problem under stochastic price recovery based on limit order book dynamics. We model price recovery after execution of a large order by accelerating the arrival of the refilling order, which is defined as a Cox process whose intensity increases by the degree of the market impact. We include not only the market order but also the limit order in our strategy in a restricted fashion. We formulate the problem as a combined stochastic control problem over a finite time horizon. The corresponding Hamilton-Jacobi-Bellman quasi-variational inequality is solved numerically. The optimal strategy obtained consists of three components: (i) the initial large trade; (ii) the unscheduled small trades during the period; (iii) the terminal large trade. The size and timing of the trade is governed by the tolerance for market impact depending on the state at each time step, and hence the strategy behaves dynamically. We also provide competitive results due to inclusion of the limit order, even though a limit order is allowed under conservative evaluation of the execution price.

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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