Please use this identifier to cite or link to this item: http://hdl.handle.net/10419/51533
Authors: 
Cavallo, Eduardo A.
Powell, Andrew
Rigobón, Roberto
Year of Publication: 
2008
Series/Report no.: 
Working paper // Inter-American Development Bank, Research Department 647
Abstract: 
If rating agencies add no new information to markets, their actions are not a public policy concern. But as rating changes may be anticipated, testing whether ratings add value is not straightforward. This paper argues that ratings and spreads are both noisy signals of fundamentals and suggest ratings add value if, controlling for spreads, they help explain other variables. The paper additionally analyzes the different actions (ratings and outlooks) of the three leading agencies for sovereign debt, also considering the differing effects of more or less anticipated events. The results are consistent across a wide range of tests. Ratings do matter and hence how the market for ratings functions may be a public policy concern.
Subjects: 
Ratings
Spreads
Information Economics
Event Studies
JEL: 
F37
G14
G15
C23
Document Type: 
Working Paper

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