How profitable a bank is affects its long-term survivability. Earnings may be retained by the bank, expanding its capital buffer, or be used to address problematic loans, likely making the bank better able to withstand financial trouble. Conversely, losses diminish a bank's ability to do those things.
Comerica Bank outperformed the average on Bankrate's test of earnings, achieving a score of 20 out of a possible 30.
Return on equity, calculated by dividing net income (essentially, profit) by the total amount of equity, is one important way to measure a bank's earnings. The most recent annualized quarterly return on equity for Comerica Bank was 10.43 percent, above the national average of 8.10 percent.
The bank reported net income of $784.6 million on total equity of $7.41 billion for the twelve months ended December 31, 2017. The bank experienced an annualized return on average assets, or ROA, of 1.09 percent, above the 1 percent deemed satisfactory in accordance with industry standards, and above the average for U.S. banks of 1.00 percent.