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ABSTRACT. In this study we investigate the common firm-specific factors associated with shares that experience extreme monthly performance on the Johannesburg Securities Exchange. A cross-sectional regression approach is followed to examine the common factors. The identified factors are used in a logistic regression approach to derive models which are used to filter shares from an independent sample to construct respective winner and loser portfolios. The results show that the winner portfolio significantly outperforms while the loser portfolio significantly underperforms the benchmark portfolio. Risk-adjusted performance evaluation further shows that the excess abnormal return obtained cannot be explained by previously suggested asset pricing models.
JEL codes: D24; E22; F21; F32; H54; O16; R53

Keywords: firm-specific factors; extreme performance; cross-sectional regression; logistic regression; abnormal return; asset pricing models

How to cite: Van Heerden, J.D., and Paul van Rensburg (2017), “Common Firm-Specific Characteristics of Extreme Performers on the Johannesburg Securities Exchange,” Economics, Management, and Financial Markets 12(3): 25–50.

Received 28 August 2016 • Received in revised form 27 October 2016
Accepted 27 October 2016 • Available online 10 November 2016

doi:10.22381/EMFM12320172

J.D. VAN HEERDEN
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Department of Statistics and Actuarial Science,
Stellenbosch University
PAUL VAN RENSBURG
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Department of Finance and Tax,
University of Cape Town

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