In this paper, we study the association between commercial paper rating downgrades and expectations of the level and variability of future earnings. Our
IntroductionThere has been some controversy in the finance literature on the role of rating agencies in disseminating financial information to capital markets. Wakeman (1984) asserts that credit ratings reflect public assessment of bond risk with a lag and do not convey new information to the market.' An alternative view is that rating agencies possess private information or superior processing ability with regard to public information so that their initial ratings and rating changes convey new information to the market.2 Consistent with the latter view, stock price reactions to rating changes for longterm instruments have been documented by Cornell, Landsman, and Shapiro (1989);Hand, Holthausen, and Leftwich (1992); Holthausen and Leftwich (1986);and Stickel (1986). More recently, Nayar and Rozeff (1994) investigated c o m e rcia1 paper (CP hereafter) issuances and rating changes and found that highly rated issuances are associated with positive stock price reactions. For rating changes, they report that downgrades produce negative stock returns, whereas upgrades have no effect.Although evidence from prior research indicates that debt rating downgrades affect security prices, the nature of the information contained in the downgrades is unclear. If the rating downgrade conveys new information on the level of future earnings, this should also be reflected in a downward revision in earnings forecasts by security analysts. Additionally, if the rating change reflects information on increased variability of future earnings or cash flows, this should be incorporated into security prices as an increase in systematic risk.Although these effects are applicable to rating changes on both long-term and short-term debt, there are two advantages to examining the latter. First, since shortterm debt matures at more frequent intervals, ratings on short-term debt are likely to be more closely scrutinized: Consequently, short-term debt rating changes may occur in a more timely fashion relative to those for longer-term securities, thereby providing a signal to investors of operational/business problems afflicting the downgraded firm. Second, since the interest rate charged on short-term debt is reset at each rollover of the maturing debt, the rating downgrade is likely to translate into higher borrowing costs faster for CP than for long-term debt. This is because for long-term debt, the firm has already locked in the interest rate at the time of initial issuance. Therefore, the impact of the CP rating change on interest costs may be reflected more quickly in earnings estimates relative to the effect of rating changes on long-teim debt.We document a significant reduction in earnings expectations around the downgrade announcement for both severely and mildly downgraded firms.3 This result is robust to adjustments made to account for the tendency of analysts to be 1. The function o...