Average earning assets
Mathematically, it can also be calculated by:
Interest income Interest expense
--------------------- minus -------------------
Avg. Earning Assets Avg. Earning Assets
The three components can tell you a lot about what sort of business the company
is in, even if you have no idea what type of bank you are looking at. This
takes some experience, but the general rule of thumb in lending and in the
securities markets is the higher the rate of interest (reward), the higher
By breaking down a company's interest income and interest expense as a percentage
of average earning assets, you can see the difference between the yield of
earning assets and the cost of earning assets. The combination of the two
is the net yield on earning assets. Unlike the income statement of a
manufacturing or service company, what can be seen as an explicit expense
is shown on the revenues line. The income statement of a bank is somewhat
more integrated than other income statements, as a major cost of revenues
-- interest expense -- is right next to interest income (a major part of
revenues) on the income statement.