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

Stavros Degiannakis and George Giannopoulos

MPRA Paper from University Library of Munich, Germany

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 (search for similar items in EconPapers)
JEL-codes: C20 G10 M41 (search for similar items in EconPapers)
Date: 2009
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Published in International Journal of Computational Economics and Econometrics 1.1(2009): pp. 89-110

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Journal Article: 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 (2009)
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