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What Is the Concept of “Stress Testing” in Margin Determination?

Stress testing in margin determination involves simulating extreme but plausible market scenarios, such as a major price crash or a sudden liquidity freeze, to calculate the maximum potential loss a portfolio could incur. The margin requirement is then set high enough to cover this stress-tested loss with a high degree of confidence.

What Is the Basic Concept behind the SPAN Margining System?
How Does the “Stress Test” Factor into Portfolio Margin Calculations?
How Is the Risk-Based Margin for a Portfolio of Options Calculated?
What Is a ‘Stress Test’ and How Does It Inform Collateral Requirements?