The paper uses recent developments of the methodology of efficiency frontiers to provide an original modeling of the risk of volatility of banking profits which relies on the estimation of a profit frontier. This methodology allows taking into account coordinated adjustments of banks’ costs to revenues as well as the absence of such adjustments. The study uses data of more than ninety French institutions running a retail banking business model over the period 1993 to 2012. Results confirm the resiliency of retail banks in crisis period.