Multifactor Indexes Made Simple: A Review of Static and Dynamic Approaches

Abstract

Multifactor index fund allocations are increasingly becoming the preferred approach to factor investing. This article examines the return–risk characteristics of nine static and dynamic weighting strategies over a 36-year period. The results highlight that a simple strategy that equal weights multiple factor indexes has historically proved more effective than many of the more complex approaches—pointing to its potential as a way to combine factors, especially in the absence of active investment views and skills. However, a dynamic factor-weighting strategy based on fundamental signals also has merit if the investor believes she has the insight or skills required.