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Serial correlation in the returns of UK capitalization based portfolios

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P. Chelley-Steeley

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Abstract

This article examines whether UK portfolio returns are time varying so that expected returns follow an AR(1) process as proposed by Conrad and Kaul for the USA. It explores this hypothesis for four portfolios that have been formed on the basis of market capitalization. The portfolio returns are modelled using a kalman filter signal extraction model in which the unobservable expected return is the state variable and is allowed to evolve as a stationary first order autoregressive process. It finds that this model is a good representation of returns and can account for most of the autocorrelation present in observed portfolio returns. This study concludes that UK portfolio returns are time varying and the nature of the time variation appears to introduce a substantial amount of autocorrelation to portfolio returns. Like Conrad and Kaul if finds a link between the extent to which portfolio returns are time varying and the size of firms within a portfolio but not the monotonic one found for the USA.

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Publisher Info
Article provided by Taylor and Francis Journals in its journal Applied Financial Economics.

Volume (Year): 14 (2004)
Issue (Month): 13 (September)
Pages: 975-979
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Handle: RePEc:taf:apfiec:v:14:y:2004:i:13:p:975-979

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  1. Fama, Eugene F & French, Kenneth R, 1992. " The Cross-Section of Expected Stock Returns," Journal of Finance, American Finance Association, vol. 47(2), pages 427-65, June. [Downloadable!] (restricted)
  2. Conrad, Jennifer & Kaul, Gautam, 1989. "Mean Reversion in Short-Horizon Expected Returns," Review of Financial Studies, Oxford University Press for Society for Financial Studies, vol. 2(2), pages 225-40. [Downloadable!] (restricted)
  3. Fama, Eugene F & French, Kenneth R, 1988. "Permanent and Temporary Components of Stock Prices," Journal of Political Economy, University of Chicago Press, vol. 96(2), pages 246-73, April. [Downloadable!] (restricted)
  4. Fama, Eugene F & MacBeth, James D, 1973. "Risk, Return, and Equilibrium: Empirical Tests," Journal of Political Economy, University of Chicago Press, vol. 81(3), pages 607-36, May-June. [Downloadable!] (restricted)
  5. Conrad, Jennifer & Kaul, Gautam, 1988. "Time-Variation in Expected Returns," Journal of Business, University of Chicago Press, vol. 61(4), pages 409-25, October. [Downloadable!] (restricted)
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