When LIBOR becomes LIEBOR: Reputational penalties and bank contagion

Abstract

We study whether commonality of incentives and opportunity to commit fraud trigger reputational contagion from culpable firms to nonculpable firms. Relying on a sample of 30 banks involved in fixing the London Interbank Offered Rate (LIBOR) and a control sample of 30 banks, we find that banks' reputations suffered substantial damage upon the announcement of their involvement in the scandal. We also document reputational contagion spread from banks that manipulated LIBOR to banks that shared the same incentives and opportunity to commit the fraud. The reputational contagion is more pronounced for large derivatives dealers who have had the strongest incentive to commit the fraud.