Abstract
Equal-weighted (EW) portfolios have outperformed their value-weighted (VW) counterparts over multiple decades in various investment universes. This article investigates the long-term evidence for the EW–VW return spread in a broad US equity universe across multiple factor models. Unsurprisingly, EW investing comes with a highly significant positive size factor exposure. Given its acyclic rebalancing character, EW investing is also found to benefit from short-term reversal effects while suffering from negative momentum exposure. The authors also document a pronounced seasonality effect in EW investing that would see outsized returns in January. They revisit these findings in the more investible universe of S&P 500 stocks and discuss how to best harvest the embedded factor premiums.
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