Nonlinear Predictability of Stock Returns? Parametric Versus Nonparametric Inference in Predictive Regressions. Issue 1 (2nd January 2022)

• Record Type: Journal Article
• Authors: Demetrescu, Matei; Hillmann, Benjamin
• Is Part Of: Journal of business & economic statistics. Volume 40:Issue 1(2022)
• Page Start: 382
• Page End: 397
• Publication Date: 2022-01-02
• Subjects: Chi-square distribution -- Endogeneity -- Nonlinear regression function -- Predictive regression -- Time-varying variance -- Unknown persistence; Economics -- Statistical methods -- Periodicals; Commercial statistics -- Periodicals; Économie politique -- Méthodes statistiques -- Périodiques; Statistique commerciale -- Périodiques; 330.015195
• DOI: 10.1080/07350015.2020.1819821
• Languages: English
• ISSNs: 0735-0015

Abstract

Abstract: Nonparametric test procedures in predictive regressions have χ 2 limiting null distributions under both low and high regressor persistence, but low local power compared to misspecified linear predictive regressions. We argue that IV inference is better suited (in terms of local power) for analyzing additive predictive models with uncertain predictor persistence. Then, a two-step procedure is proposed for out-of-sample predictions. For the current estimation window, one first tests for predictability; in case of a rejection, one predicts using a nonlinear regression model, otherwise the historic average of the stock returns is used. This two-step approach performs better than competitors (though not by a large margin) in a pseudo-out-of-sample prediction exercise for the S&P 500.