This paper questions the view that leverage should have forewarned us of the global financial crisis of 2007-09, pointing to several gearing indicators that were neither useful portents of the onset of the crisis nor of its ferocity. Instead it shows, first, that the use of ill-suited collateral...

The G-20 Data Gaps Initiative has called for the IMF to develop standard measures of tail risk, which we identify in this paper with systemic risk. To understand the conditions under which tail risk is present, it is first necessary to develop a measure of what constitutes a systemic stress, or...