The Impact of Fraudulent False Information on Equity Values

Posted by M Laavanya, Year 3 undergrad at the School of Accountancy, Singapore Management University

The Impact of Fraudulent False Information on Equity Values.

Ullah, Saif1 Massoud, Nadia2 Scholnick, Barry3

Journal of Business Ethics. Mar2014, Vol. 120 Issue 2, p219-235. 17p. 9 Charts, 4 Graphs.


There are two types of stock price manipulation examined in the theoretical literature: (1) insider trading, which involves private information that is true and (2) the public spreading of fraudulent false information. While there is a large empirical literature on insider trading, this is the first empirical article to examine the impact of false, fraudulent public information on stock prices and trading volume. We find that such false information, even after being denied by a credible source such as the SEC, generates both abnormal returns and abnormal trading volume. We also find that the effects of the false information on security returns and volume can be persistent for at least 2 weeks. In addition, we show that perpetrators of false news attacks can make potentially large profits from such market manipulations.


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