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Short Changed? The Market's Reaction to the Short Sale Ban of 2008

  • Louis Gagnon
  • Jonathan Witmer

Do short sales restrictions have an impact on security prices? We address this question in the context of a natural experiment surrounding the short sale ban of 2008 using a comprehensive sample of Canadian stocks cross-listed in the U.S. Among financial stocks, which were singled out by the ban in both countries, we observe a significant increase (74 bps) in the difference between the U.S. share price and the Canadian share price. We also observe an impressive and surprising migration of the trading volume from the U.S. to Canada among financial stocks during the ban. Both price and volume effects are reversed after the ban and neither effect manifests itself among the nonfinancial stocks. Our findings support the view that prices reflect a more optimistic valuation when pessimistic investors are kept out of the market by binding short-sales restrictions (Miller (1977)). Our findings also imply that pessimistic investors were more preponderant in the U.S. than in Canada, which is corroborated by the fact that the short interest ratio for our sample stocks was much larger in the U.S. than in Canada prior to the ban.

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Paper provided by Bank of Canada in its series Staff Working Papers with number 09-23.

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Length: 43 pages
Date of creation: 2009
Date of revision:
Handle: RePEc:bca:bocawp:09-23
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  1. Abreu, Dilip & Brunnermeier, Markus K., 2002. "Synchronization risk and delayed arbitrage," Journal of Financial Economics, Elsevier, vol. 66(2-3), pages 341-360.
  2. Arturo Bris & William N. Goetzmann & Ning Zhu, 2004. "Efficiency and the Bear: Short Sales and Markets around the World," Yale School of Management Working Papers ysm15, Yale School of Management.
  3. Brent, Averil & Morse, Dale & Stice, E. Kay, 1990. "Short Interest: Explanations and Tests," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 25(02), pages 273-289, June.
  4. Dechow, Patricia M. & Hutton, Amy P. & Meulbroek, Lisa & Sloan, Richard G., 2001. "Short-sellers, fundamental analysis, and stock returns," Journal of Financial Economics, Elsevier, vol. 61(1), pages 77-106, July.
  5. Michael J. Aitken & Alex Frino & Michael S. McCorry & Peter L. Swan, 1998. "Short Sales Are Almost Instantaneously Bad News: Evidence from the Australian Stock Exchange," Journal of Finance, American Finance Association, vol. 53(6), pages 2205-2223, December.
  6. Allen, Franklin & Gale, Douglas, 1991. "Arbitrage, Short Sales, and Financial Innovation," Econometrica, Econometric Society, vol. 59(4), pages 1041-68, July.
  7. Dilip Abreu & Markus K. Brunnermeier, 2002. "Bubbles and crashes," LSE Research Online Documents on Economics 24905, London School of Economics and Political Science, LSE Library.
  8. Fama, Eugene F, 1970. "Efficient Capital Markets: A Review of Theory and Empirical Work," Journal of Finance, American Finance Association, vol. 25(2), pages 383-417, May.
  9. Alexander, Gordon J. & Peterson, Mark A., 2008. "The effect of price tests on trader behavior and market quality: An analysis of Reg SHO," Journal of Financial Markets, Elsevier, vol. 11(1), pages 84-111, February.
  10. Diamond, Douglas W. & Verrecchia, Robert E., 1987. "Constraints on short-selling and asset price adjustment to private information," Journal of Financial Economics, Elsevier, vol. 18(2), pages 277-311, June.
  11. Andersen, Torben G & Bollerslev, Tim, 1998. "Answering the Skeptics: Yes, Standard Volatility Models Do Provide Accurate Forecasts," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 39(4), pages 885-905, November.
  12. Ackert, Lucy F. & Athanassakos, George, 2005. "The relationship between short interest and stock returns in the Canadian market," Journal of Banking & Finance, Elsevier, vol. 29(7), pages 1729-1749, July.
  13. Karl B. Diether & Christopher J. Malloy & Anna Scherbina, 2002. "Differences of Opinion and the Cross Section of Stock Returns," Journal of Finance, American Finance Association, vol. 57(5), pages 2113-2141, October.
  14. Hemang Desai & K. Ramesh & S. Ramu Thiagarajan & Bala V. Balachandran, 2002. "An Investigation of the Informational Role of Short Interest in the Nasdaq Market," Journal of Finance, American Finance Association, vol. 57(5), pages 2263-2287, October.
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