《How much market making does a market need?》
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作者:
V\\\'it Per\\v{z}ina and Jan M. Swart
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最新提交年份:
2018
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英文摘要:
We consider a simple model for the evolution of a limit order book in which limit orders of unit size arrive according to independent Poisson processes. The frequencies of buy limit orders below a given price level, respectively sell limit orders above a given level are described by fixed demand and supply functions. Buy (resp. sell) limit orders that arrive above (resp. below) the current ask (resp. bid) price are converted into market orders. There is no cancellation of limit orders. This model has independently been reinvented by several authors, including Stigler in 1964 and Luckock in 2003, who was able to calculate the equilibrium distribution of the bid and ask prices. We extend the model by introducing market makers that simultaneously place both a buy and sell limit order at the current bid and ask price. We show how the introduction of market makers reduces the spread, which in the original model is unrealistically large. In particular, we are able to calculate the exact rate at which market makers need to place orders in order to close the spread completely. If this rate is exceeded, we show that the price settles at a random level that in general does not correspond the Walrasian equilibrium price.
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中文摘要:
我们考虑了一个简单的极限订单书的演化模型,其中单位大小的极限订单根据独立的泊松过程到达。低于给定价格水平的买入限价订单和高于给定价格水平的卖出限价订单的频率由固定需求和供应函数描述。高于(或低于)当前询价(或出价)价格的买入(或卖出)限价订单将转换为市场订单。没有取消限额订单。这一模型已经被一些作者独立地重新发明,包括1964年的Stigler和2003年的Luckock,他们能够计算出买卖价格的均衡分布。我们通过引入做市商来扩展该模型,这些做市商同时以当前的买入和卖出价格下达买入和卖出限价指令。我们展示了做市商的引入如何减少价差,而在原始模型中,价差是不切实际的大。特别是,我们能够计算出做市商为了完全弥合价差而需要下订单的准确比率。如果超过这一比率,我们将表明价格在一个随机水平上结算,而这个随机水平通常不符合Walrasian均衡价格。
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分类信息:
一级分类:Quantitative Finance 数量金融学
二级分类:Mathematical Finance 数学金融学
分类描述:Mathematical and analytical methods of finance, including stochastic, probabilistic and functional analysis, algebraic, geometric and other methods
金融的数学和分析方法,包括随机、概率和泛函分析、代数、几何和其他方法
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一级分类:Mathematics 数学
二级分类:Probability 概率
分类描述:Theory and applications of probability and stochastic processes: e.g. central limit theorems, large deviations, stochastic differential equations, models from statistical mechanics, queuing theory
概率论与随机过程的理论与应用:例如中心极限定理,大偏差,随机微分方程,统计力学模型,排队论
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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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