- A portfolio-based initial margin computed by simulating changes in price and volatilitycheck_circle
- A margin charged only on option buyers
- The premium paid for buying an option
- A fixed percentage margin unrelated to risk
Correct answer
A. A portfolio-based initial margin computed by simulating changes in price and volatility
lightbulbDetailed Solution
SPAN (Standard Portfolio Analysis of Risk) computes the initial margin by scanning a portfolio's worst-case loss across a set of price and volatility scenarios. It is risk-based and portfolio-level, so offsetting positions attract lower margin. Exposure margin is charged in addition to SPAN.
Reference: NISM Series VIII Equity Derivatives, Chapter 4.
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