Outperforming equal weighting
提出三种仅依赖历史收益数据的简单长期持有组合，通过避免对主要股票因子的负暴露，在样本外测试中持续获得显著更高的风险调整后收益，挑战了等权重策略难以被超越的观点。
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.