Systemic risk is the risk that a localized disruption in financial services—caused by an institutional failure, operational break, or market panic—triggers a domino effect that threatens the real economy. Unlike standard risks, systemic shocks are frequently Endogenous, meaning they are generated within the financial system by the rational, profit-seeking activities of market actors.
Core Macroeconomic Drivers of Instability
Markets generate systemic instability through predictable economic failures:
  1. Fire-Sale Externalities: When an asset price drops, a bank may be forced to sell assets quickly to maintain its regulatory leverage ratios. This distressed selling depresses prices further, forcing other banks holding the same asset to mark down their portfolios, creating an artificial downward spiral.
  2. Information Asymmetry and Credit Freezes: During periods of high uncertainty, banks lack clear data regarding the true asset quality and exposure levels of their counterparties, prompting a sudden freeze in interbank lending markets.
  3. Collective Moral Hazard: Knowing that central banks will provide emergency liquidity backstops during large-scale crises (the “Greenspan Put”), financial institutions may collectively take on excessive leverage, increasing systemic vulnerability to economic downturns.

 
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