Insider trading in credit derivatives

Acharya, V and Johnson, T (2005) Insider trading in credit derivatives. Working Paper. London Business School IFA Working Paper.

Abstract

Insider trading in the credit derivatives market has become a significant concern for regulators and participants. This paper attempts to quantify the problem. Using news reflected in the stock market as a benchmark for public information, we report evidence of significant incremental information revelation in the credit default swap (CDS) market, consistent with the occurrence of insider trading. We show that the degree of this activity increases with the number of banks that have lending/monitoring relations with a given firm, and that this effect is robust to controls for noninformational trade. Furthermore, consistent with hedging activity by informed banks with loan exposure, information revelation in the CDS market is asymmetric, consisting exclusively of bad news. We find no evidence, however, that the degree of insider activity adversely affects prices or liquidity in either the equity or credit markets. If anything, with regard to liquidity, the reverse appears to be true.