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Time Weighted Portfolio Optimisation

Stephen L. Lee and Simon Stevenson

ERES from European Real Estate Society (ERES)

Abstract: 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is unlikely to perform well in any subsequent period as the data is still reflecting market conditions that are no longer valid.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. Consequently 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 un-weighted data.

JEL-codes: R3 (search for similar items in EconPapers)
Date: 2001-06-01
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Persistent link: https://EconPapers.repec.org/RePEc:arz:wpaper:eres2001_207

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