A second metric for profitability is the ratio of earnings before tax, interest depreciation and amortization (EBITDA) to total assets. Using data from the national accounts of the United States we define earnings before tax and interest as pre-tax profits with inventory valuation and capital consumption adjustment plus net interest. This metric follows a similar path as the ratio of retained earnings to total assets, although on a higher level and with a higher volatility.

Measuring the extent to which a firm’s value can decline before its book value becomes negative and a firm becomes insolvent, the ratio of market value of equity to total debt represents the inverse of leverage. We have defined the value of equity as the market value of outstanding equities, total debt is defined as total credit market instruments. The tremendous equity bubble of the late 1990s has collapsed, but nevertheless the equity-to-debt ratio stays above the level reached in the 1970s and 1980s. Because of its higher volatility, the ratio is largely driven by the equity performance. As a result the equity-to-debt ratio usually rises at the end of a recession because equity markets already
anticipate stronger economic growth while many companies still deleverage their balance sheets. Here again, the 2001 recession makes an exception.

About one-and-a-half years after the end of the recession in November 2001 equity markets finally marked their lows.