If there is one lesson to be learned from the 2008 financial crisis, it is that large financial institutions (LFIs) are too big to fail. Whether the too-big-to-fail doctrine is based on economic thinking (the cost of a large failure is too high) or political reality (the pressure to save LFIs is too strong), the conclusion is the same: we need to rethink how we regulate these institutions. In A New Capital Regulation For Large Financial Institutions, which I recently presented at the Law, Economics and Organizations seminar here at Harvard Law School, my co-author Luigi Zingales and I view the goal of regulation as being to preserve the incentive effects of bankruptcy while avoiding the possibility that an LFI is insolvent with respect to its systemic obligations: interbank lending, derivatives and deposits.
We introduce a new capital requirement system designed specifically for LFIs. Our mechanism mimics the way margin calls function. LFIs will post enough collateral (equity) to ensure that the debt (all the debt, not just the deposits and derivative contracts) is paid in full with probability one. When the fluctuation in the value of the underlying assets puts debt at risk, LFI equity holders are faced with a margin call and they must either inject new capital or lose their equity. There are three main differences between margin calls and our new capital requirement system: the trigger mechanism, the action taken if the trigger is activated, and the presence of an additional cushion of junior long-term debt.
