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Time weighted portfolio optimisation

Stephen Lee (Department of Land Management and Development, Faculty of Urban and Regional Studies, The University of Reading, Reading, UK)
Simon Stevenson (Department of Banking and Finance, Graduate School of Business, University College Dublin, Blackrock, Ireland)

Journal of Property Investment & Finance

ISSN: 1463-578X

Article publication date: 1 June 2003


In estimating the inputs into the modern portfolio theory (MPT) portfolio optimisation problem, it is usual to use equal weighted historic data. Equal weighting of the data, however, does not take account of the current state of the market. Consequently this approach is unlikely to perform well in any subsequent period as the data is still reflecting market conditions that are no longer valid. The need for some return weighting scheme that gives greater weight to the most recent data would seem desirable. Therefore, this study uses returns data which are weighted to give greater weight to the most recent observations to see if such a weighting scheme can offer improved ex ante performance over that based on unweighted data.



Lee, S. and Stevenson, S. (2003), "Time weighted portfolio optimisation", Journal of Property Investment & Finance, Vol. 21 No. 3, pp. 233-249.




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