We examine whether bank earnings volatility depends on bank size and the degree of concentration in the banking sector. Using quarterly data for non-investment banks in the United States for the period 2004Q1–2009Q4 and controlling for the quality of management, leverage, and diversification,...

We examine whether bank earnings volatility depends on bank size. Using quarterly data for bank holding companies in the United States for the period 1995Q1–2010Q3 and controlling for the quality of management, leverage, and diversification, we find that bank size reduces return volatility....