IDEAS home Printed from
   My bibliography  Save this paper

Post-MiFID Developments in Equity Market Liquidity


  • Carole Gresse

    () (DRM - Dauphine Recherches en Management - Université Paris-Dauphine - CNRS - Centre National de la Recherche Scientifique)


Based on two samples of non-financial large caps from the FTSE 100 and the CAC 40 and a third sample of non-financial mid caps from the SBF 120, this study looks at four monthly periods to compare market liquidity before and after the entry into effect of MiFID. Over the last monthly period, i.e. September 2009, order-flow fragmentation reached substantial levels in all three samples, although it was less pronounced among the mid caps of the SBF 120. Between 20% and 25% of total volumes on the FTSE 100 and the CAC 40 were traded OTC or internalised. As regards non-internalised regulated order flow, 25% to 30% of volumes in large caps were executed on MTFs outside the primary market, compared with around 17% for mid caps of the SBF 120. Despite the high levels of fragmentation, primary markets continue to dominate the European securities trading landscape, with market share of approximately 70% for regulated volumes in large caps and 80% for mid caps. The primary markets also have good relative price competitiveness. The rise in competition between trading venues has been accompanied by a significant decline in price spreads. This reduction in implicit transaction costs is relatively proportionate to the strength of competition, because it is more marked among large caps than among mid caps. The decline has take place at the cost of reduced depth at best limits. Several points temper this conclusion, however. First, trading volumes fell sharply between October 2007 and September 2009. Next, competition between trading systems combined with the rise of algorithmic trading have resulted in orders being more broken up, such that average transaction size has fallen even more steeply than depth at best limits. The frequency of trading and quote changes has also increased greatly. In such an environment, a static measurement of depth has drawbacks, because the frequency with which the depth is renewed is not captured. Also, the available depth appears to be divided between the most active platforms. Ultimately, increased competition has resulted in a decline in implicit transaction costs. The investors best placed to take advantage are logically those that operate on several platforms through smart order routing systems.

Suggested Citation

  • Carole Gresse, 2010. "Post-MiFID Developments in Equity Market Liquidity," Post-Print halshs-00559919, HAL.
  • Handle: RePEc:hal:journl:halshs-00559919
    Note: View the original document on HAL open archive server:

    Download full text from publisher

    File URL:
    Download Restriction: no

    More about this item


    market fragmentation; MiFID; stock market liquidity; competition; MTF;

    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:hal:journl:halshs-00559919. 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: (CCSD). 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.