This paper documents a new channel for rating-based bond market segmentation which, in contrast to prior research, is based on non-regulatory asset management practices. A 2005 Lehman Brothers index redefinition provides a quasi-natural experiment in which a number of previously high-yield...

Dealers in the over-the-counter municipal bond market form trading networks with other dealers to mitigate search frictions. Regulatory audit trail data show the dealer network has a core-periphery structure with 10 to 30 hubs and over 2,000 peripheral broker-dealers in which bonds flow in a...

We examine the network of trading relations between insurers and dealers in the over-the-counter corporate bond market. Comprehensive regulatory data shows that many insurers use only one dealer while the largest insurers have networks of up to forty dealers. Large insurers receive better prices...