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Market Reaction and Volatility in the Brazilian Stock Market

  • Otavio Ribeiro De Medeiros

    (Universidade de Brasilia, Brazil)

  • Alberto Shigueru Matsumoto

    (Fundacao Visconde de Cairu, Brazil)

We perform an event study to investigate stock returns associated to the announcement of equity issues by Brazilian firms between 1992 and 2003 aiming to determine the market reaction before, during, and after the issue announcement. After measuring abnormal returns by OLS, we used ARCH and GARCH models over 70% of the sample. The results show signs of insider information, negative abnormal returns around the announcement, and persistent negative abnormal returns in the long-term after the issue. The results are consistent with the extant empirical literature and show that ARCH/GARCH estimation of abnormal returns is superior to OLS estimation.

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File URL: http://econwpa.repec.org/eps/fin/papers/0412/0412020.pdf
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Paper provided by EconWPA in its series Finance with number 0412020.

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Length: 13 pages
Date of creation: 15 Dec 2004
Date of revision:
Handle: RePEc:wpa:wuwpfi:0412020
Note: Type of Document - pdf; pages: 13
Contact details of provider: Web page: http://econwpa.repec.org

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  1. Chiang, Thomas C & Doong, Shuh-Chyi, 2001. " Empirical Analysis of Stock Returns and Volatility: Evidence from Seven Asian Stock Markets Based on TAR-GARCH Model," Review of Quantitative Finance and Accounting, Springer, vol. 17(3), pages 301-18, November.
  2. White, Halbert, 1980. "A Heteroskedasticity-Consistent Covariance Matrix Estimator and a Direct Test for Heteroskedasticity," Econometrica, Econometric Society, vol. 48(4), pages 817-38, May.
  3. Michael Hertzel & Michael Lemmon & James S. Linck & Lynn Rees, 2002. "Long-Run Performance following Private Placements of Equity," Journal of Finance, American Finance Association, vol. 57(6), pages 2595-2617, December.
  4. Myers, Stewart C. & Majluf, Nicholas S., 1984. "Corporate financing and investment decisions when firms have information that investors do not have," Journal of Financial Economics, Elsevier, vol. 13(2), pages 187-221, June.
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  6. Hess, Alan C & Frost, Peter A, 1982. " Tests for Price Effects of New Issues of Seasoned Securities," Journal of Finance, American Finance Association, vol. 37(1), pages 11-25, March.
  7. Loughran, Tim & Ritter, Jay R, 1995. " The New Issues Puzzle," Journal of Finance, American Finance Association, vol. 50(1), pages 23-51, March.
  8. Kothari, S. P. & Zimmerman, Jerold L., 1995. "Price and return models," Journal of Accounting and Economics, Elsevier, vol. 20(2), pages 155-192, September.
  9. 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.
  10. A. Craig MacKinlay, 1997. "Event Studies in Economics and Finance," Journal of Economic Literature, American Economic Association, vol. 35(1), pages 13-39, March.
  11. Asquith, Paul & Mullins, David Jr., 1986. "Equity issues and offering dilution," Journal of Financial Economics, Elsevier, vol. 15(1-2), pages 61-89.
  12. Myers, Stewart C. & Majluf, Nicolás S., 1945-, 1984. "Corporate financing and investment decisions when firms have information that investors do not have," Working papers 1523-84., Massachusetts Institute of Technology (MIT), Sloan School of Management.
  13. Mikkelson, Wayne H. & Partch, M. Megan, 1986. "Valuation effects of security offerings and the issuance process," Journal of Financial Economics, Elsevier, vol. 15(1-2), pages 31-60.
  14. Spiess, D. Katherine & Affleck-Graves, John, 1995. "Underperformance in long-run stock returns following seasoned equity offerings," Journal of Financial Economics, Elsevier, vol. 38(3), pages 243-267, July.
  15. Gerard, Bruno & Nanda, Vikram, 1993. " Trading and Manipulation around Seasoned Equity Offerings," Journal of Finance, American Finance Association, vol. 48(1), pages 213-45, March.
  16. Miller, Merton H & Rock, Kevin, 1985. " Dividend Policy under Asymmetric Information," Journal of Finance, American Finance Association, vol. 40(4), pages 1031-51, September.
  17. Scholes, Myron S, 1972. "The Market for Securities: Substitution versus Price Pressure and the Effects of Information on Share Prices," The Journal of Business, University of Chicago Press, vol. 45(2), pages 179-211, April.
  18. Akgiray, Vedat, 1989. "Conditional Heteroscedasticity in Time Series of Stock Returns: Evidence and Forecasts," The Journal of Business, University of Chicago Press, vol. 62(1), pages 55-80, January.
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