On Fragmented Markets (DRAFT)

Instability of Centralized Markets∗

Centralized markets reduce the costs of search for buyers and sellers. Their ‘thickness’ increases the chance of order execution at competitive prices. In spite of the incentives to consolidate, some markets, securities markets and online advertising being the most notable, are fragmented into multiple trading venues. We argue that fragmentation is an inevitable feature of any centralized marke...

Price Discovery in Fragmented Markets

This paper proposes a structural time series model for the intra-day price dynamics on fragmented financial markets. We generalize the structural model of Hasbrouck (1993) to a multi-variate setting. We discuss identification issues and propose a new measure for the contribution of each market to price discovery. We illustrate the model by an empirical example using Nasdaq dealer quotes.

Single Stock Circuit Breakers – Issues in Fragmented Markets

Since the May 6 th , 2010 flash crash in the U.S., appropriate measures ensuring safe, fair and reliable markets become more relevant from the perspective of investors and regulators. Circuit breakers in various forms are already implemented for individual markets to ensure price continuity and prevent potential market failure and crash scenarios. However, coordinated inter-market safeguards ha...

Single Stock Circuit Breakers – Issues in Fragmented Markets

Since the May 6, 2010 flash crash in the U.S., appropriate measures ensuring safe, fair and reliable markets become more relevant from the perspective of investors and regulators. Circuit breakers in various forms are already implemented for individual markets to ensure price continuity and prevent potential market failure and crash scenarios. However, coordinated inter-market safeguards have h...

Asset Pricing Frictions in Fragmented Markets