Characteristic-Sorted Portfolios: Estimation and Inference

09/10/2018
by   Matias D. Cattaneo, et al.
0

Portfolio sorting is ubiquitous in the empirical finance literature, where it has been widely used to identify pricing anomalies. Despite its popularity, little attention has been paid to the statistical properties of the procedure. We develop a general framework for portfolio sorting by casting it as a nonparametric estimator. We obtain a valid mean square error expansion of the estimator and develop optimal choices for the number of portfolios. In practical settings, the optimal choice may be much larger than standard choices of 5 or 10. To illustrate the relevance of our results, we revisit the size and momentum anomalies.

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