英文标题:
《Financial Knudsen number: breakdown of continuous price dynamics and
asymmetric buy and sell structures confirmed by high precision order book
information》
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作者:
Yoshihiro Yura and Hideki Takayasu and Didier Sornette and Misako
Takayasu
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最新提交年份:
2015
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英文摘要:
We generalise the description of the dynamics of the order book of financial markets in terms of a Brownian particle embedded in a fluid of incoming, exiting and annihilating particles by presenting a model of the velocity on each side (buy and sell) independently. The improved model builds on the time-averaged number of particles in the inner layer and its change per unit time, where the inner layer is revealed by the correlations between price velocity and change in the number of particles (limit orders). This allows us to introduce the Knudsen number of the financial Brownian particle motion and its asymmetric version (on the buy and sell sides). Not being considered previously, the asymmetric Knudsen numbers are crucial in finance in order to detect asymmetric price changes. The Knudsen numbers allows us to characterise the conditions for the market dynamics to be correctly described by a continuous stochastic process. Not questioned until now for large liquid markets such as the USD/JPY and EUR/USD exchange rates, we show that there are regimes when the Knudsen numbers are so high that discrete particle effects dominate, such as during market stresses and crashes. We document the presence of imbalances of particles depletion rates on the buy and sell sides that are associated with high Knudsen numbers and violent directional price changes. This indicator can detect the direction of the price motion at the early stage while the usual volatility risk measure is blind to the price direction.
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中文摘要:
我们将金融市场指令簿的动力学描述概括为嵌入在传入、退出和湮灭粒子流体中的布朗粒子,通过分别给出每一侧(买入和卖出)的速度模型。改进后的模型建立在内层粒子数的时间平均值及其单位时间内的变化的基础上,其中内层通过价格速度和粒子数变化(限制订单)之间的相关性来揭示。这允许我们介绍金融布朗粒子运动的努森数及其不对称版本(在买卖双方)。以前没有考虑过,不对称的Knudsen数在金融中至关重要,以便检测不对称的价格变化。Knudsen数字使我们能够描述连续随机过程正确描述市场动态的条件。直到现在,对于美元/日元和欧元/美元汇率等大型流动性市场,我们还没有提出质疑。我们表明,当努森数如此之高,以至于离散粒子效应占主导地位时,存在一些机制,例如在市场压力和崩盘期间。我们记录了与高努森数和剧烈的方向性价格变化相关的买卖双方粒子消耗率的不平衡。该指标可以在早期阶段检测价格运动的方向,而通常的波动性风险度量对价格方向是盲目的。
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分类信息:
一级分类:Quantitative Finance 数量金融学
二级分类:Trading and Market Microstructure 交易与市场微观结构
分类描述:Market microstructure, liquidity, exchange and auction design, automated trading, agent-based modeling and market-making
市场微观结构,流动性,交易和拍卖设计,自动化交易,基于代理的建模和做市
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