Short-sale bans have been frequently utilized globally as a regulatory tool during periods of financial crisis. This paper is a review of the observed intended and unintended effects. We see that short-sale bans have pervasive effects spanning many financial markets that include options,...

We examine the role of high-frequency traders (HFTs) in price discovery and price efficiency. Overall HFTs facilitate price efficiency by trading in the direction of permanent price changes and in the opposite direction of transitory pricing errors, both on average and on the highest volatility...

Over-the-counter (OTC) markets dominate trading in many asset classes. Will electronic trading displace traditional OTC “voice” trading? Can electronic and voice systems coexist? What types of securities and trades are best suited for electronic trading? We study these issues by focusing on...

We examine empirically the role of high-frequency traders (HFTs) in price discovery and price efficiency. Based on our methodology, we find overall that HFTs facilitate price efficiency by trading in the direction of permanent price changes and in the opposite direction of transitory pricing...

We solve a multi-period model of strategic trading with long-lived information in multiple assets with correlated innovations in fundamental values. Market makers in each asset can only condition their price functions on trading in the that asset (but not on trading in the other asset). Using...

This paper examines daily inventory/asset price dynamics using 11 years of NYSE specialist data. The unique length and breadth of our sample enables the first longer horizon testing of market making inventory models - e.g., Grossman and Miller (1988). We confirm such models' predictions that...