Wirtschaftswissenschaft

Erik Theissen

Floor versus Screen Trading: Evidence from the German Stock Market

Jahrgang 158 () / Heft 1, S. 32-54 (23)

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We analyze the transaction costs in floor and computerized trading systems. In Germany, floor and screen trading for the same stocks exist in parallel. Bid-ask spreads are not generally lower in one trading system, but the electronic trading system is less attractive for less liquid stocks. This is confirmed by an analysis of the market shares. Spreads in the electronic trading system are more sensitive to changes in return volatility, and the adverse-selection component is larger. We argue that these differences are due to differing degrees of anonymity and discuss implications for the design of electronic trading systems.
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