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Modeling Returns and Unconditional Variance in Risk Neutral World for Liquid and Illiquid Market

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ABSTRACT
This article seeks to model daily asset returns using log-ARCH-Lévy type model which is expected to reproduce most of the stylized features of financial time series data (such as volatility clustering, leptokurtic nature of log returns, joint covariance structure and aggregational Gaussianity) that are empirically found in different types of market. In addition, unconditional variance of daily log returns in risk neutral world of different conditional heteroscedastic models is derived. A key observation is that liquid markets and illiquid market may not have the same underlying dynamics. For instance empirical analysis based on S&P500 index log returns as a liquid market do not have autoregressive part in their first moments while in Nairobi Securities Exchange NSE20 index there is strong presence of autoregressive dynamics of order three, i.e. AR(3). Higher moments of both markets are serially correlated.
 
Cite this paper
Mwaniki, I. (2015) Modeling Returns and Unconditional Variance in Risk Neutral World for Liquid and Illiquid Market. Journal of Mathematical Finance, 5, 15-25. doi: 10.4236/jmf.2015.51002.
 
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http://dx.doi.org/10.2307/1913242                                    eww150129lx
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