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Information Leakage and Market Efficiency


  • Markus K. Brunnermeier


This article analyzes the effects of information leakage on trading behavior and market efficiency. A trader who receives a noisy signal about a forthcoming public announcement can exploit it twice. First, when he receives it, and second, after the public announcement since he knows best the extent to which his information is already reflected in the pre-announcement price. Given his information he expects the price to overshoot and intends to partially revert his trade. While information leakage makes the price process more informative in the short-run, it reduces its informativeness in the long-run. The analysis supports Securities and Exchange Commission's Regulation Fair Disclosure. Copyright 2005, Oxford University Press.

Suggested Citation

  • Markus K. Brunnermeier, 2005. "Information Leakage and Market Efficiency," Review of Financial Studies, Society for Financial Studies, vol. 18(2), pages 417-457.
  • Handle: RePEc:oup:rfinst:v:18:y:2005:i:2:p:417-457

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    References listed on IDEAS

    1. Warren Bailey & Haitao Li & Connie X. Mao & Rui Zhong, 2003. "Regulation Fair Disclosure and Earnings Information: Market, Analyst, and Corporate Responses," Journal of Finance, American Finance Association, vol. 58(6), pages 2487-2514, December.
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    5. Brunnermeier, Markus K., 2001. "Asset Pricing under Asymmetric Information: Bubbles, Crashes, Technical Analysis, and Herding," OUP Catalogue, Oxford University Press, number 9780198296980.
    6. Huddart, Steven & Hughes, John S & Levine, Carolyn B, 2001. "Public Disclosure and Dissimulation of Insider Trades," Econometrica, Econometric Society, vol. 69(3), pages 665-681, May.
    7. Ausubel, Lawrence M, 1990. "Insider Trading in a Rational Expectations Economy," American Economic Review, American Economic Association, vol. 80(5), pages 1022-1041, December.
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    9. Easley, David & O'Hara, Maureen, 1987. "Price, trade size, and information in securities markets," Journal of Financial Economics, Elsevier, vol. 19(1), pages 69-90, September.
    10. Eleswarapu, Venkat R. & Thompson, Rex & Venkataraman, Kumar, 2004. "The Impact of Regulation Fair Disclosure: Trading Costs and Information Asymmetry," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 39(02), pages 209-225, June.
    11. Leland, Hayne E, 1992. "Insider Trading: Should It Be Prohibited?," Journal of Political Economy, University of Chicago Press, vol. 100(4), pages 859-887, August.
    12. Kyle, Albert S, 1985. "Continuous Auctions and Insider Trading," Econometrica, Econometric Society, vol. 53(6), pages 1315-1335, November.
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    Cited by:

    1. Park, Young S. & Lee, Jaehyun, 2010. "Detecting insider trading: The theory and validation in Korea Exchange," Journal of Banking & Finance, Elsevier, vol. 34(9), pages 2110-2120, September.
    2. Markus K. Brunnermeier & Martin Oehmke, 2014. "Predatory Short Selling," Review of Finance, European Finance Association, vol. 18(6), pages 2153-2195.
    3. Hsu, Chih-Hsiang, 2016. "Strategic noise trading of later-informed traders in a multi-market framework," Economic Modelling, Elsevier, vol. 54(C), pages 235-243.
    4. repec:dau:papers:123456789/9015 is not listed on IDEAS
    5. Michaelides, Alexander & Milidonis, Andreas & Nishiotis, George P. & Papakyriakou, Panayiotis, 2015. "The adverse effects of systematic leakage ahead of official sovereign debt rating announcements," Journal of Financial Economics, Elsevier, vol. 116(3), pages 526-547.
    6. D. Thorleuchter & D. Van Den Poel, 2012. "Protecting Research and Technology from Espionage," Working Papers of Faculty of Economics and Business Administration, Ghent University, Belgium 12/824, Ghent University, Faculty of Economics and Business Administration.
    7. Olivier Rousse & Benoît Sévi, 2016. "Informed Trading in Oil-Futures Market," Working Papers hal-01410093, HAL.
    8. Bernile, Gennaro & Hu, Jianfeng & Tang, Yuehua, 2016. "Can information be locked up? Informed trading ahead of macro-news announcements," Journal of Financial Economics, Elsevier, vol. 121(3), pages 496-520.
    9. Panayiotis Papakyriacou & George Nishiotis & Andreas Milidonis & Alex Michaelides, 2012. "Sovereign Debt Rating Changes and the Stock Market," 2012 Meeting Papers 522, Society for Economic Dynamics.
    10. Tirapat, Sunti & Visaltanachoti, Nuttawat, 2013. "Opportunistic insider trading," Pacific-Basin Finance Journal, Elsevier, vol. 21(1), pages 1046-1061.
    11. Ozsoylev, Han N. & Walden, Johan, 2011. "Asset pricing in large information networks," Journal of Economic Theory, Elsevier, vol. 146(6), pages 2252-2280.
    12. Alexander Kurov & Alessio Sancetta & Georg H. Strasser & Marketa Halova Wolfe, 2015. "Price Drift before U.S. Macroeconomic News: Private Information about Public Announcements?," Boston College Working Papers in Economics 881, Boston College Department of Economics, revised 29 Jul 2015.
    13. Yılmaz, Işıl Sevilay & Tanyeri, Başak, 2016. "Global Merger and Acquisition (M&A) activity: 1992–2011," Finance Research Letters, Elsevier, vol. 17(C), pages 110-117.
    14. de Resende, Charlene C. & Pereira, Adriano C.M. & Cardoso, Rodrigo T.N. & de Magalhães, A.R. Bosco, 2017. "Investigating market efficiency through a forecasting model based on differential equations," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 474(C), pages 199-212.
    15. repec:eee:jetheo:v:169:y:2017:i:c:p:517-545 is not listed on IDEAS
    16. Robert Hull & Sungkyu Kwak & Rosemary Walker, 2014. "Hedge fund attributes and volatility around equity offerings," Journal of Economics and Finance, Springer;Academy of Economics and Finance, vol. 38(3), pages 359-382, July.
    17. Beyer, Anne & Cohen, Daniel A. & Lys, Thomas Z. & Walther, Beverly R., 2010. "The financial reporting environment: Review of the recent literature," Journal of Accounting and Economics, Elsevier, vol. 50(2-3), pages 296-343, December.
    18. Chung, Dennis & Hrazdil, Karel, 2010. "Liquidity and market efficiency: A large sample study," Journal of Banking & Finance, Elsevier, vol. 34(10), pages 2346-2357, October.

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