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Middlemen in Limit Order Markets

Listed author(s):
  • Albert J. Menkveld

    (VU University Amsterdam)

  • Boyan Jovanovic

    (NYU Economics)

We model high-frequency traders in electronic markets. We ask how the presence of such middlemen may affect welfare. We find that middlemen process public information faster than the average investor. As such, they can play a positive or a negative role. On the positive side, when they enter a market they can raise welfare by solving a pre-existing adverse selection problem. In that case their entry is accompanied by a rise in trade and a fall in bid-ask spreads, and they can raise welfare by up to 30% of the gap between its equilibrium level and its first-best level. On the negative side, they can create or exacerbate an adverse- selection problem, in which case spreads rise and trade declines. Our evidence on this score is mixed. On the one hand, middlemen’s participation lowers spreads but, on the other, it also lowers trade.

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Paper provided by Society for Economic Dynamics in its series 2010 Meeting Papers with number 955.

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Date of creation: 2010
Handle: RePEc:red:sed010:955
Contact details of provider: Postal:
Society for Economic Dynamics Marina Azzimonti Department of Economics Stonybrook University 10 Nicolls Road Stonybrook NY 11790 USA

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