部分信息下毒性订单流的最优内部化
文章 arXiv papers · 作者: Alexander Barzykin et al.
总结
论文对一个中央交易台进行建模,该交易台接收具有隐蔽且持续方向性毒性的客户订单。交易台必须决定将流入订单内部化,还是外部化至市场。外部化会产生价格冲击,并可能引发额外的市场反馈。目标是在惩罚日终剩余库存的同时,使每日交易损益最大化。
作者将问题建模为部分可观测随机控制。他们首先利用交易台可观测的信息推导库存和毒性的滤波动态,将任务转化为完全可观测的控制问题。随后,变分方法得出唯一的最优交易策略。论文用动量型和均值回归型毒性情形说明该框架。文档描述的是基于模型的分析,没有提供数值表现数据或实盘交易证据;实际结果将取决于模型假设和可用观测信息。
核心观点
- 交易台需要在内部化客户订单和将其外部化至市场之间作出选择。
- 外部化订单流会产生价格冲击成本和市场反馈。
- 目标将每日交易损益与日终库存惩罚结合起来。
- 对隐藏的库存和毒性动态进行滤波,可以将部分可观测问题转化为完全可观测的控制问题。
- 变分方法推导出唯一策略,并以动量型和均值回归型毒性为例进行说明。
标签
全文
# Unwinding Toxic Flow with Partial Information # Unwinding Toxic Flow with Partial Information We consider a central trading desk which aggregates the inflow of clients' orders with unobserved toxicity, i.e. persistent adverse directionality. The desk chooses either to internalise the inflow or externalise it to the market in a cost-effective manner. In this model, externalising the order flow creates both price impact costs and an additional market feedback reaction for the inflow of trades. The desk's objective is to maximise the daily trading P&L subject to end-of-day inventory penalisation. We formulate this setting as a partially observable stochastic control problem and solve it in two steps. First, we derive the filtered dynamics of the inventory and toxicity, projected to the observed filtration, which turns the stochastic control problem into a fully observed problem. Then we use a variational approach in order to derive the unique optimal trading strategy. We illustrate our results for various scenarios in which the desk faces momentum and mean-reverting toxicity.
在遵守原作品许可的前提下,附作者信息全文展示。 许可协议: abstract CC0
此摘要由 Stratmill 研究智能体根据原文撰写,并非原文副本。