IDEAS home Printed from
   My bibliography  Save this paper

On the importance of clean accounting measures for the tests of stock market efficiency



Tests of the semi-strong form of the efficient market hypothesis (EMH) typically use earnings and book value of equity as benchmarks of fundamental value. Accounting earnings, however, are contaminated by noise due to their transient component and book value of equity tends to be biased downwards due to accounting conservatism. We investigate whether controlling for these effects impacts on the implications concerning the information efficiency of the Swedish stock market. We conclude that relevant adjustments increase both the magnitude and the consistency of the value premium earned on a contrarian investment strategy that buys (shorts) stocks with low (high) relative market valuation. The existence of the value premium cannot be explained by common risk proxies or transaction costs argument. Using cleaner accounting proxies thus strengthens the evidence on the imperfect efficiency of the Swedish stock market.

Suggested Citation

  • Mattias Hamberg & Jiri Novak, 2007. "On the importance of clean accounting measures for the tests of stock market efficiency," Working Papers IES 2007/25, Charles University Prague, Faculty of Social Sciences, Institute of Economic Studies, revised Sep 2007.
  • Handle: RePEc:fau:wpaper:wp2007_25

    Download full text from publisher

    File URL:
    Download Restriction: no

    References listed on IDEAS

    1. Louis Kuijs & Alain Borghijs, 2004. "Exchange Rates in Central Europe; A Blessing or a Curse?," IMF Working Papers 04/2, International Monetary Fund.
    2. Christopher J. Neely, 2000. "Are changes in foreign exchange reserves well correlated with official intervention?," Review, Federal Reserve Bank of St. Louis, issue Sep, pages 17-32.
    3. Roland Vaubel, 1976. "Real exchange-rate changes in the European community: The empirical evidence and its implications for European currency unification," Review of World Economics (Weltwirtschaftliches Archiv), Springer;Institut für Weltwirtschaft (Kiel Institute for the World Economy), vol. 112(3), pages 429-470, September.
    4. James H. Stock & Motohiro Yogo, 2002. "Testing for Weak Instruments in Linear IV Regression," NBER Technical Working Papers 0284, National Bureau of Economic Research, Inc.
    5. Angel Serrat, 2000. "Exchange Rate Dynamics in a Multilateral Target Zone," Review of Economic Studies, Oxford University Press, vol. 67(1), pages 193-211.
    6. Maeso-Fernandez, Francisco & Osbat, Chiara & Schnatz, Bernd, 2004. "Towards the estimation of equilibrium exchange rates for CEE acceding countries: methodological issues and a panel cointegration perspective," Working Paper Series 353, European Central Bank.
    7. Mongelli, Francesco Paolo, 2002. "ìNew" Views on the Optimum Currency Area Theory: What is EMU Telling US?," Royal Economic Society Annual Conference 2002 140, Royal Economic Society.
    8. Ian Babetskii, 2005. "Trade integration and synchronization of shocks," The Economics of Transition, The European Bank for Reconstruction and Development, vol. 13(1), pages 105-138, January.
    Full references (including those not matched with items on IDEAS)

    More about this item


    market efficiency; investment; contrarian strategy; transitory earnings; accounting conservatism; Sweden; Scandinavia;

    JEL classification:

    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading

    NEP fields

    This paper has been announced in the following NEP Reports:


    Access and download statistics


    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:fau:wpaper:wp2007_25. See general information about how to correct material in RePEc.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Lenka Herrmannova). General contact details of provider: .

    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.

    We have no references for this item. You can help adding them by using 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 RePEc Author Service 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.

    IDEAS is a RePEc service hosted by the Research Division of the Federal Reserve Bank of St. Louis . RePEc uses bibliographic data supplied by the respective publishers.