Original Research

Using an inflation-augmented price-earnings ratio to guide tactical asset allocation

Adrian Saville
South African Journal of Economic and Management Sciences | Vol 12, No 2 | a277 | DOI: https://doi.org/10.4102/sajems.v12i2.277 | © 2011 Adrian Saville | This work is licensed under CC Attribution 4.0
Submitted: 18 August 2011 | Published: 22 August 2011

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Adrian Saville, Gordon Institute of Business Science, South Africa

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Asset allocation plays a central role in determining investment outcomes, and available evidence shows that portfolio results can be enhanced through tactical asset allocation if managers use the simple price-earnings ratio as a predictor of equity returns. Recently, some international evidence has emerged which shows that, by augmenting the price-earnings metric with information about consumer price inflation, further enhancements can be achieved in tactical asset allocation.  This study reviews these arguments  as they apply to South Africa, and finds that an inflation-augmented price-earnings ratio is more successful in forecasting equity returns than is the simple price-earnings ratio.  Moreover, the metric is found to be significant in explaining relative asset class returns. On a risk-adjusted basis, however, the tool fails to improve the portfolio results when compared to a buy-and-hold strategy. 


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