Market-making with Search and Information Frictions

Lester, Benjamin; Shourideh, Ali; Venkateswaran, Venky; Zetlin-Jones, Ariel

Working Paper

Market-making with Search and Information Frictions

Abstract: We develop a dynamic model of trading through market-makers that incorporates two canonical sources of illiquidity: trading (or search) frictions, which imply that market-makers have some amount of market power; and information frictions, which imply that market-makers face some degree of adverse selection. We use this model to study the effects of various technological innovations and regulatory initiatives that have reduced trading frictions in over-the-counter markets. Our main result is that reducing trading frictions can lead to less liquidity, as measured by bid-ask spreads. The key insight is that more frequent trading?or more competition among dealers?makes traders? behavior less dependent on asset quality. As a result, dealers learn about asset quality more slowly and set wider bid-ask spreads to compensate for this increase in uncertainty.

Keywords: Adverse selection; trading frictions; bid-ask spreads; liquidity; learning;