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Contenido informativo de los cambios de Rating en el mercado de Valores Español

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Abstract

This work analyzes the effect of corporate bond rating rating changes over stock prices. This topic has not been analyzed before on the Spanish stock market. They are analyzed changes in the qualification of debt risk granted by agencies like Moody's or Standard and Poor's among others. On an efficient market, if these changes contain new information it should be observed some type of response. The used methodology is the event study. The evidence indicates that bond rating changes contain useful information. Rating downgrades cause significantly negative abnormal returns. Surprinsingly, the upgrades have the same effect. The investors can be interpreting these raises as bad news, if they were waiting for a better upgrade.

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File URL: http://eprints.ucm.es/7703/1/0304.pdf
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Bibliographic Info

Paper provided by Universidad Complutense de Madrid, Facultad de Ciencias Económicas y Empresariales in its series Documentos del Instituto Complutense de Análisis Económico with number 0304.

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Length: 37 pages
Date of creation: 2003
Date of revision:
Handle: RePEc:ucm:doicae:0304

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Keywords: Cambio de rating; Estudio de eventos; Rating changes; Event study.;

This paper has been announced in the following NEP Reports:

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  1. Cable, John & Holland, Kevin, 1999. "Regression vs. non-regression models of normal returns: implications for event studies," Economics Letters, Elsevier, vol. 64(1), pages 81-85, July.
  2. Richard Followill & Terrence Martell, 1997. "Bond review and rating change announcements: An examination of informational value and market efficiency," Journal of Economics and Finance, Springer, vol. 21(2), pages 75-82, June.
  3. Crouhy, Michel & Galai, Dan & Mark, Robert, 2001. "Prototype risk rating system," Journal of Banking & Finance, Elsevier, vol. 25(1), pages 47-95, January.
  4. Nayar, Nandkumar & Rozeff, Michael S, 1994. " Ratings, Commercial Paper, and Equity Returns," Journal of Finance, American Finance Association, vol. 49(4), pages 1431-49, September.
  5. John D. Lyon & Brad M. Barber & Chih-Ling Tsai, 1999. "Improved Methods for Tests of Long-Run Abnormal Stock Returns," Journal of Finance, American Finance Association, vol. 54(1), pages 165-201, 02.
  6. Holthausen, Robert W. & Leftwich, Richard W., 1986. "The effect of bond rating changes on common stock prices," Journal of Financial Economics, Elsevier, vol. 17(1), pages 57-89, September.
  7. Brown, Stephen J. & Warner, Jerold B., 1985. "Using daily stock returns : The case of event studies," Journal of Financial Economics, Elsevier, vol. 14(1), pages 3-31, March.
  8. Corrado, Charles J., 1989. "A nonparametric test for abnormal security-price performance in event studies," Journal of Financial Economics, Elsevier, vol. 23(2), pages 385-395, August.
  9. Maynes, Elizabeth & Rumsey, John, 1993. "Conducting event studies with thinly traded stocks," Journal of Banking & Finance, Elsevier, vol. 17(1), pages 145-157, February.
  10. Hand, John R M & Holthausen, Robert W & Leftwich, Richard W, 1992. " The Effect of Bond Rating Agency Announcements on Bond and Stock Prices," Journal of Finance, American Finance Association, vol. 47(2), pages 733-52, June.
  11. Griffin, Paul A & Sanvicente, Antonio Z, 1982. " Common Stock Returns and Rating Changes: A Methodological Comparison," Journal of Finance, American Finance Association, vol. 37(1), pages 103-19, March.
  12. Impson, C Michael & Karafiath, Imre & Glascock, John L, 1992. "Testing Beta Stationarity across Bond Rating Changes," The Financial Review, Eastern Finance Association, vol. 27(4), pages 607-18, November.
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