In light of the current debate about the link between accounting and financial stability, we investigate the determinants of procyclical book leverage for U.S. commercial and savings banks. We find that total asset growth and GDP growth are both positively related to book leverage growth. Our evidence is not consistent with the notion that fair value accounting contributes to procyclical leverage or that historical cost accounting reduces procyclicality. Overall, the business model of banks is more important for procyclical leverage than accounting or regulatory risk weights.

We analyze the limits of regulating bank CEO compensation to reduce risk shifting in the presence of an active board that retains the right to approve new investment strategies. Compensation regulation prevents overinvestment in strategies that increase risk, but it is ineffective in preventing underinvestment in strategies that reduce risk. The regulator optimally combines compensation and capital regulations. In contrast, if the board delegates the choice of strategy to the CEO, compensation regulation is sufficient to prevent both types of risk shifting. Compensation regulation increases shareholders’ incentives to implement an active board, which reduces the effectiveness of compensation regulation.