Factor Zoo (.zip) : A Review
The world of asset pricing has seen a proliferation of factors said to be determinants of stock returns, leading to what the authors of this study aptly term the ‘factor zoo’.
Blitz et al.’s research, “Factor Zoo .zip,” takes a deep dive into this factor menagerie! Moreover, attempting to discern which of these are genuinely indispensable!
Anthony Ross, Laurette Taylor, Eddie Dowling and Julie Haydon in the Broadway production of The Glass Menagerie (1945)
At the heart of this study is a central question: How can we trim the extensive list of purported factors to a more manageable and meaningful set without compromising the explanation of available alpha? Remarkably, the authors find that the vast landscape of factors can be compressed to a mere 15, suggesting a significant overlap and redundancy among the many factors currently being considered in asset pricing models.
A pivotal insight from this research is the inadequacy of widely-used asset pricing models that leverage only a few factors. These models, while perhaps more straightforward, may fail to capture the multifaceted nature of stock returns as revealed by the 15 essential factors identified by Blitz et al.
A particularly interesting facet of the research is its emphasis on the dynamism of factor importance. Even as they identify core factor styles that remain consistent over time, the specific representatives of these styles can and do change. This fluidity highlights a critical aspect of factor investing: the need for ongoing innovation and adaptability.
In conclusion, “Factor Zoo .zip” by Blitz and colleagues serves as a clarion call for the asset pricing community. It underscores the necessity of reevaluating the extensive array of factors often considered while stressing the importance of agility in factor selection. This research not only paves the way for more streamlined and efficient asset pricing models but also underscores the need for continuous innovation in the realm of factor investing.
