We study the information content of corporate bond rating changes regarding future earnings and dividends. Consistent with previous findings, rating downgrades are associated with negative abnormal stock returns, while rating upgrades appear to be nonevents. For downgrades, earnings decline in the two years prior to and the year of the rating change announcement but increase in the year after the rating review. We also find that rating downgrades are followed by a subsequent downward adjustment in dividends. While rating upgrades follow a period of rising earnings, they do not signal any increase in future earnings and no subsequent dividend adjustments are observed. Overall, our results indicate that rating agencies respond more to permanent changes in cash flows and provide little information, if any, about future cash flows.
Corporate Bond Rating Drift: An Examination of Credit Quality Rating Changes Over Time
