Outperforming equal weighting

The equally weighted portfolio has been shown to outperform many more sophisticated ones, despite not requiring any computations. We demonstrate that the equally weighted stock portfolio can be consistently enhanced by avoiding negative exposure to some of the most prominent equity factors. This can be achieved while preserving the simplicity of the portfolio construction process. Specifically, we introduce three simple long-only portfolios that rely solely on historical return data. These portfolios are slight conceptual deviations from the equally weighted strategy, yet they consistently generate significantly higher risk-adjusted returns in realistic out-of-sample assessments. We provide the most straightforward examples to challenge the notion that outperforming the equally weighted strategy is difficult. • We present simple enhancements to the equally weighted (1/n) strategy. • Exploiting the momentum and low-volatility anomalies improves risk and return. • We consider highly liquid stocks and provide several robustness checks. • The enhancements are easy to implement and do not require much more turnover.

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Publication Details

Journal
Economics Letters
Published
2025-08-15
DOI
https://doi.org/10.1016/j.econlet.2025.112552
Citations
2
Primary Topic
Risk and Portfolio Optimization
Type
article
Field-Weighted Citation Impact
4.21
Controls
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article

Outperforming equal weighting

Antonello Cirulli, Patrick S. Walker
2 citations
Economics Letters
Risk and Portfolio Optimization
4.21
article

Outperforming equal weighting

Antonello Cirulli, Patrick S. Walker
article en
2 citations

Abstract

The equally weighted portfolio has been shown to outperform many more sophisticated ones, despite not requiring any computations. We demonstrate that the equally weighted stock portfolio can be consistently enhanced by avoiding negative exposure to some of the most prominent equity factors. This can be achieved while preserving the simplicity of the portfolio construction process. Specifically, we introduce three simple long-only portfolios that rely solely on historical return data. These portfolios are slight conceptual deviations from the equally weighted strategy, yet they consistently generate significantly higher risk-adjusted returns in realistic out-of-sample assessments. We provide the most straightforward examples to challenge the notion that outperforming the equally weighted strategy is difficult. • We present simple enhancements to the equally weighted (1/n) strategy. • Exploiting the momentum and low-volatility anomalies improves risk and return. • We consider highly liquid stocks and provide several robustness checks. • The enhancements are easy to implement and do not require much more turnover.

Economics LettersVol. 255
Geo7 (Switzerland) (CH), Swiss Finance Institute (CH)
Openalex Percentile: Top 6%
Risk and Portfolio Optimization
4.21
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