How Is ‘Value at Risk’ (VaR) Used in Calculating Margin Requirements?

Value at Risk (VaR) is a statistical measure used by CCPs and prime brokers to estimate the maximum potential loss a portfolio could incur over a specified time horizon (e.g. one day) at a given confidence level (e.g. 99%).

The calculated VaR is then used as the basis for the initial margin requirement. The initial margin is set to be at least equal to the VaR, ensuring that the collateral covers the expected worst-case loss scenario.

What Is the Formula for Calculating Initial Margin under a Standard Portfolio Margining Model?
How Are Initial Margin Requirements Calculated for Options and Derivatives?
How Does a Portfolio’s “Value at Risk” (VaR) Calculation Often Underestimate Tail Risk?
How Does the Net Premium Affect the Maximum Loss Amount?
How Does the Concept of “Value at Risk (VaR)” Relate to Setting Margin Levels?
What Is the Formula for Calculating the Required Margin Given a Leverage Level?
How Does a Fund Calculate the Required Collateral (Margin) for a Portfolio of Options?
How Does the Concept of “Value at Risk” (VaR) Influence Margin Setting?

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