Market Efficiency Reloaded: Why Insider Trades do not Reveal Exploitable Information
Several studies have emphasized a slow price adjustment to reported insider trades for Germany. The results presented in this paper, though, show that this is mainly caused by a subset of high arbitrage risk stocks. In fact, the abnormal return difference between the quintiles of stocks with highest and lowest idiosyncratic risk is in the range of 2.99-4.90% over a 20-day interval. These results are robust even in the context of a joint generalized least squares approach. By developing a simple zero-investment arbitrage trading strategy mimicking insider trades, it turns out that such a trading strategy, in most cases, generates significant positive returns as long as transaction costs are neglected. However, the outperformance disappears in all risk quintiles, if bid/ask spreads are taken into account. We conclude that the market's under-reaction to reported insider trades can mainly be explained by the cost of risky arbitrage and is therefore not exploitable. Copyright 2009 The Authors. Journal Compilation Verein für Socialpolitik and Blackwell Publishing Ltd. 2009.
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Volume (Year): 11 (2010)
Issue (Month): (08)
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Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Campbell, Cynthia J. & Wesley, Charles E., 1993. "Measuring security price performance using daily NASDAQ returns," Journal of Financial Economics, Elsevier, vol. 33(1), pages 73-92, February.
- Jensen, Michael C., 1978. "Some anomalous evidence regarding market efficiency," Journal of Financial Economics, Elsevier, vol. 6(2-3), pages 95-101.
- Betzer, André & Theissen, Erik, 2007.
"Insider trading and corporate governance: The case of Germany,"
CFR Working Papers
07-07, University of Cologne, Centre for Financial Research (CFR).
- André Betzer & Erik Theissen, 2009. "Insider Trading and Corporate Governance: The Case of Germany," European Financial Management, European Financial Management Association, vol. 15(2), pages 402-429.
- Stoll, Hans R. & Whaley, Robert E., 1983. "Transaction costs and the small firm effect," Journal of Financial Economics, Elsevier, vol. 12(1), pages 57-79, June.
- 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.
- Jeffrey Wurgler & Ekaterina Zhuravskaya, 2000.
"Does Arbitrage Flatten Demand Curves for Stocks?,"
Yale School of Management Working Papers
ysm152, Yale School of Management, revised 01 Nov 2001.
- Jana P. Fidrmuc & Marc Goergen & Luc Renneboog, 2006.
"Insider Trading, News Releases, and Ownership Concentration,"
Journal of Finance,
American Finance Association, vol. 61(6), pages 2931-2973, December.
- Fidrmuc Jana P. & Goergen Marc & Renneborg Luc, 2005. "Insider Trading, News Releases and Ownership Concentration," Working Papers wpn05-03, Warwick Business School, Finance Group.
- Fidrmucova, J. & Goergen, M. & Renneboog, L.D.R., 2005. "Insider Trading, News Releases and Ownership Concentration," Discussion Paper 2005-025, Tilburg University, Tilburg Law and Economic Center.
- Fidrmucova, J. & Goergen, M. & Renneboog, L.D.R., 2005. "Insider Trading, News Releases and Ownership Concentration," Discussion Paper 2005-97, Tilburg University, Center for Economic Research.
- Andrei Shleifer ad Robert W. Vishny, 1995.
"The Limits of Arbitrage,"
Harvard Institute of Economic Research Working Papers
1725, Harvard - Institute of Economic Research.
- Pontiff, Jeffrey, 2006. "Costly arbitrage and the myth of idiosyncratic risk," Journal of Accounting and Economics, Elsevier, vol. 42(1-2), pages 35-52, October.
- Bhushan, Ravi, 1991. "Trading Costs, Liquidity, and Asset Holdings," Review of Financial Studies, Society for Financial Studies, vol. 4(2), pages 343-60.
- Michael S. Rozeff & Mir A. Zaman, 1998. "Overreaction and Insider Trading: Evidence from Growth and Value Portfolios," Journal of Finance, American Finance Association, vol. 53(2), pages 701-716, 04.
- Olaf Stotz, 2006. "Germany's New Insider Law: The Empirical Evidence after the First Year," German Economic Review, Verein für Socialpolitik, vol. 7, pages 449-462, November.
- Heidorn, Thomas & Meyer, Bernd & Pietrowiak, Alexander, 2004. "Performance-Effekte nach Directors' Dealings in Deutschland, Italien und den Niederlanden," Frankfurt School - Working Paper Series 57, Frankfurt School of Finance and Management.
- Pontiff, Jeffrey, 1996. "Costly Arbitrage: Evidence from Closed-End Funds," The Quarterly Journal of Economics, MIT Press, vol. 111(4), pages 1135-51, November.
- Anat R. Admati, Paul Pfleiderer, 1988. "A Theory of Intraday Patterns: Volume and Price Variability," Review of Financial Studies, Society for Financial Studies, vol. 1(1), pages 3-40.
- Betzer, André & Theissen, Erik, 2008. "Sooner or later: delays in trade reporting by corporate insiders," CFR Working Papers 08-06, University of Cologne, Centre for Financial Research (CFR).
- Gishan Dissanaike & Alexandre Le Fur, 2003. "On the Use of the Log CAR Measure in Event Studies," Journal of Business Finance & Accounting, Wiley Blackwell, vol. 30, pages 1165-1170.
- Lin, Ji-Chai & Howe, John S, 1990. " Insider Trading in the OTC Market," Journal of Finance, American Finance Association, vol. 45(4), pages 1273-84, September.
- Rajan, Raghuram G & Zingales, Luigi, 1995.
" What Do We Know about Capital Structure? Some Evidence from International Data,"
Journal of Finance,
American Finance Association, vol. 50(5), pages 1421-60, December.
- Raghuram G. Rajan & Luigi Zingales, 1994. "What Do We Know About Capital Structure? Some Evidence from International Data," NBER Working Papers 4875, National Bureau of Economic Research, Inc.
- Dymke, Björn M. & Walter, Andreas, 2006. "Insider trading in Germany: Do corporate insiders exploit inside information?," Tübinger Diskussionsbeiträge 309, University of Tübingen, School of Business and Economics.
- Mashruwala, Christina & Rajgopal, Shivaram & Shevlin, Terry, 2006. "Why is the accrual anomaly not arbitraged away? The role of idiosyncratic risk and transaction costs," Journal of Accounting and Economics, Elsevier, vol. 42(1-2), pages 3-33, October.
- 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.
- Schultz, Paul, 1983. "Transaction costs and the small firm effect : A comment," Journal of Financial Economics, Elsevier, vol. 12(1), pages 81-88, June.
- Richard R. Mendenhall, 2004. "Arbitrage Risk and Post-Earnings-Announcement Drift," The Journal of Business, University of Chicago Press, vol. 77(4), pages 875-894, October.
- Sylvain Friederich & Alan Gregory & John Matatko & Ian Tonks, 2002. "Short-run Returns around the Trades of Corporate Insiders on the London Stock Exchange," European Financial Management, European Financial Management Association, vol. 8(1), pages 7-30.
- Rozeff, Michael S & Zaman, Mir A, 1988. "Market Efficiency and Insider Trading: New Evidence," The Journal of Business, University of Chicago Press, vol. 61(1), pages 25-44, January.
- A. Craig MacKinlay, 1997. "Event Studies in Economics and Finance," Journal of Economic Literature, American Economic Association, vol. 35(1), pages 13-39, March.
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