Monthly Momentum Rotation Across Equity Styles

Summary

The document describes a monthly long–short strategy that ranks six Russell equity style portfolios: small-, mid-, and large-cap value and growth. Each month, it measures their returns over the previous 12 months, buys the strongest style, and shorts the weakest. It presents style rotation as a way to apply momentum at the portfolio or index level, with the potential advantage of using accessible index funds rather than selecting many individual stocks.

The cited research reports positive results in several settings, including a long–short average annual return of 9.25% over a 34-year study in one paper. Other findings vary: UK value/growth rotation was unprofitable in one study, while size rotation was profitable; results also differ across index families and holding periods. The document cautions that evidence about crisis-period correlation is lacking, so the strategy’s suitability as a hedge is unknown. Historical findings do not establish future performance, and implementation costs and risk need evaluation.

Key ideas

• The strategy ranks six Russell value and growth portfolios by their trailing 12-month returns.
• It buys the best-performing style and shorts the worst-performing style, rebalancing monthly.
• Research cited in the document reports that style momentum has appeared across multiple index settings.
• Reported performance varies by market, index family, market capitalization, and holding period.
• The document says crisis-period correlation is unknown, so hedge effectiveness requires further testing.

Tags

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