Discussion paper

DP8350 Learning from Prices, Liquidity Spillovers, and Market Segmentation

We describe a new mechanism that explains the transmission of liquidity shocks from one security to another ("liquidity spillovers"). Dealers use prices of other securities as a source of information. As prices of less liquid securities convey less precise information, a drop in liquidity for one security raises the uncertainty for dealers in other securities, thereby affecting their liquidity. The direction of liquidity spillovers is positive if the fraction of dealers with price information on other securities is high enough. Otherwise liquidity spillovers can be negative. For some parameters, the value of price information increases with the number of dealers obtaining this information. In this case, related securities can appear segmented, even if the cost of price information is small.


Foucault, T and G Cespa (2011), ‘DP8350 Learning from Prices, Liquidity Spillovers, and Market Segmentation‘, CEPR Discussion Paper No. 8350. CEPR Press, Paris & London. https://cepr.org/publications/dp8350