We develop a simple yet realistic framework to analyze the impact of an exogenous shock on a bank's balance-sheet and its optimal response when it is constrained to maintain its risk-based capital ratio above a regulatory threshold. We show that in a stress scenario, capital requirements may force the bank to shrink the size of its assets and we exhibit the bank's optimal strategy as a function of regulatory risk-weights, asset market liquidity and shock size. When nancial markets are perfectly competitive, we show that the bank is always able to restore its capital ratio above the required one. However, for banks constrained to sell their loans at a discount and/or with a positive price impact when selling their marketable assets (large banks) we exhibit situations in which the deleveraging process generates a death spiral. We then show how to calibrate our model using annual reports of banks and study in detail the case of the French bank BNP Paribas. Finally, we suggest how our simple framework can be used to design a systemic capital surcharge.
The radical restructuring of the German utility giants RWE and E.ON in the wake of Germany's shift to renewable energy motivates the need of a formal model of corporate social responsible (CSR) investment appraisal with environmental externalities. We offer in this paper a model that uses the tools of decision analysis to value the option to postpone the project. We show that adding a CSR dimension to projects generating negative environmental externalities can induce the firm to invest immediately, whereas it always postpones projects without CSR activities. According to the project's attributes, the paper also determines the optimal level of effort in CSR.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.