How Are Initial Margin Requirements Calculated for Options and Derivatives?

Initial margin for options and derivatives is typically calculated using sophisticated risk models like SPAN (Standard Portfolio Analysis of Risk) or VaR (Value at Risk). These models simulate thousands of potential market scenarios, including changes in price and volatility, to estimate the potential loss a portfolio could suffer over a specific time horizon (e.g. two days).

The initial margin is then set at a level high enough to cover this estimated potential loss to a high degree of confidence, such as 99% or 99.5%.

How Is Value at Risk (VaR) Used in Setting Position Limits?
How Is the Amount of Initial Margin Calculated by a Central Counterparty (CCP)?
How Is the Amount of Initial Margin for an Options Position Calculated?
How Is the Amount of Initial Margin Calculated for a Portfolio of Derivatives?
How Does the Concept of ‘Value at Risk’ (VaR) Relate to Margin Setting?
How Does the SPAN Margin System Work?
What Is the Standard Portfolio Analysis of Risk (SPAN) Margin System?
What Is Performance Bond Margin, and How Is It Calculated for Futures?

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