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Bid-ask spreads with indirect competition among specialists

  • Gehrig, Thomas
  • Jackson, Matthew

We examine the bid-ask quotes offered by specialists (or dealers) who face indirect competition from other specialists who trade in related assets. In the context of a simple model where investors have mean variance preferences, we characterize the equilibrium bids and asks quoted by K specialists in N assets, where some specialists may control more than one asset. We compare the equilibrium spreads as the number (and factor structure) of the assets each specialist controls is varied. It is shown that for some constellations of initial portfolio holdings and asset covariance it is socially preferable to have competing specialists, while for others it is socially preferable to have their actions coordinated (or to have one specialist control several assets). In a simple factor model, we show how the optimal specialist control structure depends on whether the assets trade as substitutes or complements. In some situations it is beneficial to have specialist power concentrated within industries, in other situations, across industries, and in yet other situations, not to be concentrated at all.

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Article provided by Elsevier in its journal Journal of Financial Markets.

Volume (Year): 1 (1998)
Issue (Month): 1 (April)
Pages: 89-119

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Handle: RePEc:eee:finmar:v:1:y:1998:i:1:p:89-119
Contact details of provider: Web page: http://www.elsevier.com/locate/finmar

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