CDS Momentum: Slow-Moving Credit Ratings and Cross-Market Spillovers[Insider trading in credit derivatives]

This paper highlights the adverse consequences of sluggish credit rating updates in creating information efficiency distortions and investment anomalies. We first document significant credit default swap (CDS) return momentum yielding 7.1% per year. We further show that cross-market momentum strategies based on information in past CDS performance generates an alpha of 10.3% per year in stocks and 7.3% per year in bonds. These CDS momentum and cross-market effects are stronger among more liquid, informationally rich CDS contracts whose CDS spreads move in anticipation of important, yet slow-moving, credit rating changes. (JEL G12, G14)Received February 19, 2020; editorial decision July 10, 2020 by Editor Jeffrey Pontiff. Authors have furnished an Internet Appendix, which is available on the Oxford University Press Web site next to the link to the final published paper online.