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A stochastic model for order book dynamics(订单动态随机模型)
A stochastic model for order book dynamics
Rama Cont, Sasha Stoikov, Rishi Talreja
IEOR Dept, Columbia University, New York
rama.cont@, sashastoikov@, rt2146@
We propose a stochastic model for the continuous-time dynamics of a limit order book. The model strikes
a balance between two desirable features: it captures key empirical properties of order book dynamics and
its analytical tractability allows for fast computation of various quantities of interest without resorting to
simulation. We describe a simple parameter estimation procedure based on high-frequency observations of
the order book and illustrate the results on data from the Tokyo stock exchange. Using Laplace transform
methods, we are able to efficiently compute probabilities of various events, conditional on the state of the
order book: an increase in the mid-price, execution of an order at the bid before the ask quote moves, and
execution of both a buy and a sell order at the best quotes before the price moves. Comparison with high-
frequency data shows that our model can capture accurately the short term dynamics of the limit order
book.
Key words : Limit order book, financial engineering, Laplace transform inversion, queueing systems,
simulation.
1
Cont, Stoikov and Talreja: A stochastic model for order book dynamics
2
Contents
1 Introduction 3
2 A continuous-time model for a stylized limit order book 4
2.1 Limit order books . . . . . . . . . . .
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