We present a theory of risk capital and of how tax and other costs of risk capital should be allocated in a financial firm. Risk capital is equity investment that backs obligations to creditors and other liability holders and maintains the firm׳s credit quality. Credit quality is measured by the ratio of the value of the firm׳s option to default to the default-free value of its liabilities. Marginal default values provide a full and unique allocation of risk capital. Efficient capital allocations maintain credit quality and preclude risk shifting. Our theory leads to an adjusted present value (APV) criterion for making investment and contracting decisions. We set out implications for risk management and corporate finance.

ABSTRACT Managers often claim that target firms are financially constrained prior to being acquired and that these constraints are eased following the acquisition. Using a large sample of European acquisitions, we document that the level of cash that target firms hold, the sensitivity of cash to cash flow, and the sensitivity of investment to cash flow all decline, while investment increases following the acquisition. These effects are stronger in deals that are more likely to be associated with financing improvements. Our findings suggest that acquisitions relieve financial frictions in target firms, especially when the target firm is relatively small.