Staff Reports
A Leverage-Based Measure of Financial Instability
August 2014 Number 688
Revised February 2021
JEL classification: E58, G01, G10, G20

Authors: Tobias Adrian, Karol Jan Borowiecki, and Alexander Tepper 

The size and the leverage of financial market investors and the elasticity of demand of unlevered investors define MinMaSS, the smallest market size that can support a given degree of leverage. The financial system’s potential for financial crises can be measured by the stability ratio, the fraction of total market size to MinMaSS. We use that financial stability metric to gauge the buildup of vulnerability in the run-up to the 1998 Long-Term Capital Management crisis and argue that policymakers could have detected the potential for the crisis.

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