Systemic risk involves the possibility of a widespread breakdown in the financial system, typically originating from the failure of a single entity or a group of entities. It is characterized by the interconnectedness of financial institutions and markets, where the distress of one can impact others. For example, during the 2008 financial crisis, the collapse of Lehman Brothers not only affected its direct creditors but also led to significant disruptions in various sectors of the global economy.
This type of risk is generally more challenging to manage than individual financial risks because it affects multiple sectors simultaneously. Regulators and financial institutions often implement measures such as stress testing and capital requirements to monitor and mitigate systemic risk. Related concepts include systemic importance, which identifies institutions whose failure could pose a risk to the broader financial system, and contagion, which describes the spread of financial distress from one market to another.