Strategic Specialist and Market Liquidity

41 Pages Posted: 6 Nov 2006

Date Written: February 2007


The empirical literature suggests that the limit order book contains information that might be used by the specialist for his own advantage. We develop a model of insider trading where there is a specialist who has access to the order book and informed traders who receive information about the liquidation value of the asset. The presence of a strategic specialist in the market induces non-monotonicity of market indicators with respect to the variance of liquidation value. Moreover, the existence of private information about supply significantly affects market performance as it induces, among other effects, lower market liquidity. Finally, our model suggests another link between Kyle's (1985, 1989) and Glosten and Milgrom's (1985) models by allowing for strategic behavior of the specialist.

Keywords: Insider trading, Strategic Specialist, Market liquidity

JEL Classification: D82, G12, G14

Suggested Citation

Dumitrescu, Ariadna, Strategic Specialist and Market Liquidity (February 2007). EFA 2007 Ljubljana Meetings Paper. Available at SSRN: or

Ariadna Dumitrescu (Contact Author)

ESADE Business School ( email )

Av. Pedralbes 60-62
Barcelona, 08034

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