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arXiv 0904.0900q-fin.TRq-fin.ST
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订单簿事件的价格影响:市价订单、限价订单和取消

The price impact of order book events: market orders, limit orders and cancellations

Zoltan Eisler, Jean-Philippe Bouchaud, Julien Kockelkoren

摘要:

虽然市价订单的长期相关性及其对价格的影响已经在文献中得到了比较好的研究,相应的限价订单和取消的研究是罕见的。我们在这里提供了所有这些不同的事件之间的相互关系,以及它们各自对未来价格变化的影响的实证研究。我们定义并从数据中提取这些事件的“裸”影响,如果它们单独发生的话。对于大型股票,我们表明,一个模型,其中所有事件的裸影响是永久性的和非波动的是在良好的协议与数据。然而,对于小报价股票,裸影响必须包含历史依赖部分,反映订单簿的内部波动。我们表明,这种影响可以准确地描述了一个自回归模型上的过去订单流。该框架允许我们将事件的影响分解为三个部分:瞬时跳跃分量,不同事件的未来速率的修改,以及最佳报价背后的未来差距的修改。我们详细比较了目前的形式主义与临时影响模型,提出了较早的描述市价订单的影响时,其他类型的事件没有观察到。最后,我们扩展模型来描述动态的买卖价差。

英文摘要:

While the long-ranged correlation of market orders and their impact on prices has been relatively well studied in the literature, the corresponding studies of limit orders and cancellations are scarce. We provide here an empirical study of the cross-correlation between all these different events, and their respective impact on future price changes. We define and extract from the data the "bare" impact these events would have, if they were to happen in isolation. For large tick stocks, we show that a model where the bare impact of all events is permanent and non-fluctuating is in good agreement with the data. For small tick stocks, however, bare impacts must contain a history dependent part, reflecting the internal fluctuations of the order book. We show that this effect can be accurately described by an autoregressive model on the past order flow. This framework allows us to decompose the impact of an event into three parts: an instantaneous jump component, the modification of the future rates of the different events, and the modification of the future gaps behind the best quotes. We compare in detail the present formalism with the temporary impact model that was proposed earlier to describe the impact of market orders when other types of events are not observed. Finally, we extend the model to describe the dynamics of the bid-ask spread.

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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