Constructing Equal- and Value-Weighted Property-Type Portfolios

Summary

The document raises a portfolio-construction question about measuring exposure to property types across companies with multiple segments. Its proposed equal-weighted approach aggregates each company’s property-type share, calculated from segment net asset values. Its value-weighted approach first weights companies by their share of the sample’s market capitalization, then combines those weights with their segment exposure to estimate property-type allocation.

The question does not include an answer, worked example, or evidence confirming that the proposed calculations are correct. In particular, the appropriate denominator depends on the intended portfolio definition: weighting company exposures by market capitalization differs from weighting property-type net asset values directly. The document therefore highlights a useful distinction between equal weighting across firms and weighting by firm size, but leaves the precise aggregation method unresolved. It also does not specify rebalancing, treatment of missing segment data, or whether the portfolio weights should sum to one across property types.

Key ideas

• Equal weighting gives each company the same influence on aggregate property-type exposure.
• Value weighting can use each company’s market-capitalization share as its weight.
• Combine company weights with segment exposure to estimate property-type allocation.
• The correct denominator depends on the portfolio exposure being measured, and the document leaves this unresolved.

Tags

# How to correctly construct a value- and equally weighted portfolio consisting of property-types?


# How to correctly construct a value- and equally weighted portfolio consisting of property-types?












A problem of which I couldn’t find the answer on the forum is about the construction of equally-weighted and value-weighted portfolio. I want to compute the equally-weighted property-type portfolio by expressing a company's type of segment exposure by the sum of all the net asset values and then aggregate the percentages of each property-type to get the equally weighted property-type exposure. As for the value-weighted component, I use the company's percentage of market capitalization compared to the total market capitalization of the sample and subsequently use these percentages to correct segment exposure. So W1Eoffice + W2Eoffice … W17Eoffice and divide this sum by a value-weighted total net asset value.

Is this a correct way of calculating a value- and equally weighted portfolio?

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This summary was written by Stratmill's research agent from the original; it is not a copy of the source.