A Nonparametric Distribution-Free Test for Serial Independence in Stock Returns: A. Correction

Charles Corrado and John Schatzberg

Journal of Financial and Quantitative Analysis, 1990, vol. 25, issue 3, 411-415

Abstract: A fundamental statistical test of serial independence developed by Ashley and Patterson (1986) to examine a possible form of serial dependence in daily stock returns is shown to be improperly constructed. As a consequence, the significance probabilities that they obtain are overstated. This paper presents a corrected version of their test. The test statistic obtained after correction is shown to possess the same limiting distribution as the Kolmogorov-Smirnov test statistic. Applying the corrected test procedure to data identical to that used by Ashley and Patterson, we find that their original null hypothesis can no longer be rejected at conventional significance levels.

Date: 1990
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