Market Efficiency Reloaded: Why Insider Trades do not Reveal Exploitable Information
AbstractSeveral 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.
Download InfoIf you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
As the access to this document is restricted, you may want to look for a different version under "Related research" (further below) or search for a different version of it.
Bibliographic InfoArticle provided by Verein für Socialpolitik in its journal German Economic Review.
Volume (Year): 11 (2010)
Issue (Month): (08)
Contact details of provider:
Web page: http://www.blackwellpublishing.com/journal.asp?ref=1465-6485
More information through EDIRC
Other versions of this item:
- Dickgiesser, Sebastian & Kaserer, Christoph, 2008. "Market efficiency reloaded: why insider trades do not reveal exploitable information," CEFS Working Paper Series 2008-04, Center for Entrepreneurial and Financial Studies (CEFS), Technische Universität München.
- G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
- G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading
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.:
- Fidrmucova, J. & Goergen, M. & Renneboog, L.D.R., 2005.
"Insider Trading, News Releases and Ownership Concentration,"
2005-97, Tilburg University, Center for Economic Research.
- 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.
- 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.
- 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.
- 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.
- Dymke, Björn M. & Walter, Andreas, 2006. "Insider trading in Germany: Do corporate insiders exploit inside information?," TÃ¼binger DiskussionsbeitrÃ¤ge 309, University of Tübingen, School of Business and Economics.
- 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.
- Jensen, Michael C., 1978. "Some anomalous evidence regarding market efficiency," Journal of Financial Economics, Elsevier, vol. 6(2-3), pages 95-101.
- Jeffrey Wurgler & Ekaterina Zhuravskaya, 2002.
"Does Arbitrage Flatten Demand Curves for Stocks?,"
The Journal of Business,
University of Chicago Press, vol. 75(4), pages 583-608, October.
- Schultz, Paul, 1983. "Transaction costs and the small firm effect : A comment," Journal of Financial Economics, Elsevier, vol. 12(1), pages 81-88, June.
- 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.
- 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.
- 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.
- A. Craig MacKinlay, 1997. "Event Studies in Economics and Finance," Journal of Economic Literature, American Economic Association, vol. 35(1), pages 13-39, March.
- 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.
- 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.
- 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).
- 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.
- Andrei Shleifer & Robert W. Vishny, 1995.
"The Limits of Arbitrage,"
NBER Working Papers
5167, National Bureau of Economic Research, Inc.
- Andrei Shleifer ad Robert W. Vishny, 1995. "The Limits of Arbitrage," Harvard Institute of Economic Research Working Papers 1725, Harvard - Institute of Economic Research.
- 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.
- 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.
- 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.
- 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.
- Bhushan, Ravi, 1991. "Trading Costs, Liquidity, and Asset Holdings," Review of Financial Studies, Society for Financial Studies, vol. 4(2), pages 343-60.
- 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.
- 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.
- 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).
- 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.
- 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.
- Pontiff, Jeffrey, 1996. "Costly Arbitrage: Evidence from Closed-End Funds," The Quarterly Journal of Economics, MIT Press, vol. 111(4), pages 1135-51, November.
- Nicolai Bissantz & Verena Steinorth & Daniel Ziggel, 2011. "Stabilität von Diversifikationseffekten im Markowitz-Modell," AStA Wirtschafts- und Sozialstatistisches Archiv, Springer, vol. 5(2), pages 145-157, August.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Wiley-Blackwell Digital Licensing) or (Christopher F. Baum).
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
If references are entirely missing, you can add them using this form.
If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.
Please note that corrections may take a couple of weeks to filter through the various RePEc services.