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随机PDE限价订单簿动态模型

文章 arXiv papers · 作者: Rama Cont et al.

总结

本文介绍一类限价订单簿模型,使用随机偏微分方程描述订单簿相对于中间价的变化。乘性噪声刻画订单簿形态的变化,而另一个独立的随机过程描述与订单流相关的中间价。作者指出了使这些动态能够表示为有限维马尔可夫过程的条件,从而支持更高效的估计和计算。

本文考察了两个简约示例:一个双因子模型和一个深度均值回归模型。模型参数与价格行为、深度、成交量和订单失衡相关,并赋予模型变量以金融含义。文中称这些模型能够再现价格变动、市场深度和订单流中的统计特征。摘录没有提供具体实证结果,所提出的可处理性也取决于有限维表示成立的指定条件。

核心观点

  • 一个带乘性噪声的随机PDE描述相对于中间价的限价订单簿。
  • 中间价遵循与订单流相关的随机动态。
  • 在特定条件下,模型可简化为有限维马尔可夫过程,从而提高计算效率。
  • 两个示例分别采用双因子结构和均值回归订单簿深度。
  • 模型将参数与价格变化、深度、成交量和订单失衡联系起来。

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# A stochastic partial differential equation model for limit order book dynamics


# A stochastic partial differential equation model for limit order book dynamics









We propose an analytically tractable class of models for the dynamics of a limit order book, described through a stochastic partial differential equation (SPDE) with multiplicative noise for the order book centered at the mid-price, along with stochastic dynamics for the mid-price which is consistent with the order flow dynamics. We provide conditions under which the model admits a finite dimensional realization driven by a (low-dimensional) Markov process, leading to efficient estimation and computation methods. We study two examples of parsimonious models in this class: a two-factor model and a model with mean-reverting order book depth. For each model we analyze in detail the role of different parameters, the dynamics of the price, order book depth, volume and order imbalance, provide an intuitive financial interpretation of the variables involved and show how the model reproduces statistical properties of price changes, market depth and order flow in limit order markets.

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。