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arXiv 0901.0495q-fin.TRphysics.soc-ph
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价格大幅变动时的限价订单簿研究

Studies of the limit order book around large price changes

Bence Toth, Janos Kertesz, J. Doyne Farmer

摘要:

我们研究了流动性股票在经历了日内价格大幅变动后,其限价订单簿的动态变化。在数据中,我们发现几个显微镜测量的变化很大,例如,波动性买卖价差、买卖不平衡、排队限价订单的数量、限价订单的活动(数量和数量)以及取消等。数量的放松通常非常缓慢,可以用指数的幂律$\approx0.4$来描述。为了更好地理解实证结果,我们引入了一个数值模型。我们发现,零智力沉积模型的订单流的经验结果可以定性地重现。这表明,缓慢的放松可能不是代理人的战略行为的结果。研究经验和数字发现的指数之间的差异有助于我们更好地确定战略行为在现象中的作用。

英文摘要:

We study the dynamics of the limit order book of liquid stocks after experiencing large intra-day price changes. In the data we find large variations in several microscopical measures, e.g., the volatility the bid-ask spread, the bid-ask imbalance, the number of queuing limit orders, the activity (number and volume) of limit orders placed and canceled, etc. The relaxation of the quantities is generally very slow that can be described by a power law of exponent $\approx0.4$. We introduce a numerical model in order to understand the empirical results better. We find that with a zero intelligence deposition model of the order flow the empirical results can be reproduced qualitatively. This suggests that the slow relaxations might not be results of agents' strategic behaviour. Studying the difference between the exponents found empirically and numerically helps us to better identify the role of strategic behaviour in the phenomena.

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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