Deceptive advertising and abnormal stock returns

This study examined the impact of deceptive advertising on the abnormal stock returns of firms. Using an event study analysis with 101 cases from the FTC database over the period 1987–2005, the FTC rulings on deceptive advertising were found to have the negative effects on the abnormal stock returns of firms. Among the firm-specific factors examined in this study, the amount of advertising expenditures played a role in alleviating the impact of deceptive advertising on the abnormal stock returns, and the firms charged with consent agreements alone were found to lose less firm value than those charged with additional actions by the FTC. Results also showed that the negative effects on the abnormal stock returns created by the FTC actions did not quickly disappear afterwards. These results imply that marketing managers should exercise caution in designing advertising messages that may or may not intend to violate the FTC rules and regulations on deceptive advertising.