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Using a mean changing stochastic processes exit-entry model for stock market long-short prediction

Lleo, Sebastien, Zhitlukhin, Mikhail and Ziemba, William (2021) Using a mean changing stochastic processes exit-entry model for stock market long-short prediction. Systemic Risk Centre Discussion Papers (109). Systemic Risk Centre, The London School of Economics and Political Science, London, UK.

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Stochastic processes is one of the key operations research tools for analysis of complex phenomenon. This paper has a unique application to the study of mean changing models in stock markets. The idea is to enter and exit stock markets like Apple Computer and the broad S&P500 index at good times and prices (long and short). Research by Chopra and Ziemba showed that mean estimation was far more important to portfolio success than variance or co-variance estimation. The idea in the stochastic process model is to determine when the mean changes and then reverse the position direction. This is applied to Apple Computer stock in 2012 when it rallied dramatically then had a large fall and Apple Computer and the S&P500 in the 2020 Covid-19 era. The results show that the mean changing model greatly improves on a buy and hold strategy even for securities that have has large gains over time but periodic losses which the model can exploit. This type of model is also useful to exit bubble-like stock markets and a number of these in the US, Japan, China and Iceland are described. An innovation in this paper is the exit entry long short feature which is important in financial markets.

Item Type: Monograph (Discussion Paper)
Official URL:
Additional Information: © 2021 The Author(s)
Divisions: Systemic Risk Centre
Subjects: H Social Sciences > HC Economic History and Conditions
H Social Sciences > HG Finance
JEL classification: B - Schools of Economic Thought and Methodology > B2 - History of Economic Thought since 1925 > B20 - General
G - Financial Economics > G0 - General > G00 - General
G - Financial Economics > G1 - General Financial Markets > G12 - Asset Pricing; Trading volume; Bond Interest Rates
G - Financial Economics > G1 - General Financial Markets > G15 - International Financial Markets
Date Deposited: 05 Jun 2023 14:27
Last Modified: 16 Sep 2023 00:00

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