SPAN Margin System

Calculation

The SPAN Margin System, initially developed by Standard & Poor’s, represents a risk-based margin methodology utilized across exchanges trading options and, increasingly, cryptocurrency derivatives. Its core function involves calculating margin requirements for options positions by assessing the potential price sensitivity of underlying assets and options contracts, rather than relying on static, percentage-based margins. This approach employs a ‘what-if’ scenario analysis, simulating extreme market movements to determine the maximum potential loss a portfolio could experience, and subsequently, the margin needed to cover that exposure. The system’s efficiency stems from its ability to net positions and recognize offsetting risks, leading to potentially lower margin requirements compared to simpler methods.