Is PEAD a Consequence of the Presence of the Cognitive Bias of Self-Attribution in Investors’ Expectations Regarding Permanent Earnings? Evidence from Athens Stock Exchange

International Journal of Computational Economics and Econometrics, Vol. 1, No. 1, pp. 89-110, 2009

22 Pages Posted: 11 Apr 2011

See all articles by Stavros Antonios Degiannakis

Stavros Antonios Degiannakis

Department of Economic and Regional Development, Panteion University of Political and Social Sciences

George Giannopoulos

Kingston University

Date Written: April 8, 2011

Abstract

The main objective of the paper is to test whether post-earnings announcement drift (PEAD) is a consequence of the presence of self-attribution bias in investors’ expectations, regarding permanent earnings. This is the first study to examine empirically this issue, in the sample of Athens Stock Exchange firms. Self-attribution bias implies that the investors respond asymmetrically to confirmations and negations of their prior expectations, regarding permanent earnings, which are based on private information.

Confirmations of prior expectations, which are based on private information, lead to increases in investors’ confidence in their expectations, regarding permanent earnings. On the other side, negations of prior expectations, which are based on private information, fail to diminish investors’ confidence, regarding permanent earnings. The study provides evidence that self-attribution bias does not drive PEAD in Athens Stock Exchange firms.

Keywords: Post-Earnings Announcement Drift, PEAD, Self-Attribution Bias, Asymmetric Response, Private Information, Forecast Revision, Forecast Error, Athens Stock Exchange, Earnings Announcement, Computational Economics

Suggested Citation

Degiannakis, Stavros Antonios and Giannopoulos, George, Is PEAD a Consequence of the Presence of the Cognitive Bias of Self-Attribution in Investors’ Expectations Regarding Permanent Earnings? Evidence from Athens Stock Exchange (April 8, 2011). International Journal of Computational Economics and Econometrics, Vol. 1, No. 1, pp. 89-110, 2009, Available at SSRN: https://ssrn.com/abstract=1806046

Stavros Antonios Degiannakis (Contact Author)

Department of Economic and Regional Development, Panteion University of Political and Social Sciences ( email )

136 Sygrou
Athens
Greece

George Giannopoulos

Kingston University ( email )

Penrhyn Road
Kingston-upon-Thames
Surrey, KT1 2EE
United Kingdom

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