Modelling financial transaction price movements: a dynamic integer count data model

Roman Liesenfeld, Ingmar Nolte and Winfried Pohlmeier ()
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Roman Liesenfeld: Christian-Albrechts-Universität

A chapter in High Frequency Financial Econometrics, 2008, pp 167-197 from Springer

Abstract: In this paper we develop a dynamic model for integer counts to capture fundamental properties of financial prices at the transaction level. Our model relies on an autoregressive multinomial component for the direction of the price change and a dynamic count data component for the size of the price changes. Since the model is capable of capturing a wide range of discrete price movements it is particularly suited for financial markets where the trading intensity is moderate or low. We present the model at work by applying it to transaction data of two shares traded at the NYSE traded over a period of one trading month. We show that the model is well suited to test some theoretical implications of the market microstructure theory on the relationship between price movements and other marks of the trading process. Based on density forecast methods modified for the case of discrete random variables we show that our model is capable to explain large parts of the observed distribution of price changes at the transaction level.

Keywords: Financial transaction prices; Autoregressive conditional multinomial model; GLARMA; Count data; Market microstructure effects (search for similar items in EconPapers)
Date: 2008
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Journal Article: Modelling financial transaction price movements: a dynamic integer count data model (2006)
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DOI: 10.1007/978-3-7908-1992-2_8

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