Operational risk is currently receiving significant media attention, as financial scandals have appeared regularly and multiple events have exceeded one billion dollars in total impact. Regulators have also been devoting attention to this risk, and are finalizing proposals that would require...

Quantification of operational risk has received increased attention with the inclusion of an explicit capital charge for operational risk under the new Basle proposal. The proposal provides significant flexibility for banks to use internal models to estimate their operational risk, and the...

We examine the stock market reaction to announcements of formal supervisory actions. We find that the variation in the quality and timeliness of disclosure by U.S. banks explains much of the variation in the market's reactions. We also find that these announcements can cause spillover effects....