日经期货订单流价格冲击与流动性风险建模
文章 arXiv papers · 作者: Masaaki Kijima et al.
总结
本研究构建了一个联系订单流、价格冲击与流动性风险市场价格的框架。分析推导出一个微分方程,并给出两个闭式解。其中一个复现了经典知情交易者模型所对应的线性订单流冲击;在信息不对称程度较低时,该框架则得出订单流与价格冲击之间呈 S 形关系。
作者使用日经期货日内数据检验该框架,并将估计的冲击与行业启发式函数进行比较。他们认为,该模型能够估算流动性风险参数,并可能解释随机波动率和相关性。他们还发现,市场深度反映了流动性风险的市场价格。文档没有报告样本期、定量拟合效果或执行成本,因此它提出的是一种建模视角,尚无足够证据评估实际交易表现。
核心观点
- 该框架将订单流价格冲击与流动性风险的市场价格联系起来。
- 其解包括线性和 S 形两种冲击曲线。
- 研究使用日经期货日内数据估算价格冲击,并与行业启发式方法比较。
- 该模型将流动性风险参数与随机波动率和相关性联系起来。
- 研究发现,市场深度包含有关流动性风险价格的信息。
标签
全文
# Market Price of Trading Liquidity Risk and Market Depth # Market Price of Trading Liquidity Risk and Market Depth Price impact of a trade is an important element in pre-trade and post-trade analyses. We introduce a framework to analyze the market price of liquidity risk, which allows us to derive an inhomogeneous Bernoulli ordinary differential equation. We obtain two closed form solutions, one of which reproduces the linear function of the order flow in Kyle (1985) for informed traders. However, when traders are not as asymmetrically informed, an S-shape function of the order flow is obtained. We perform an empirical intra-day analysis on Nikkei futures to quantify the price impact of order flow and compare our results with industry's heuristic price impact functions. Our model of order flow yields a rich framework for not only to estimate the liquidity risk parameters, but also to provide a plausible cause of why volatility and correlation are stochastic in nature. Finally, we find that the market depth encapsulates the market price of liquidity risk.
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