The Standard Portfolio Analysis of Risk, or SPAN, is a system for calculating

margin Margin may refer to: Physical or graphical edges *Margin (typography), the white space that surrounds the content of a page * Continental margin, the zone of the ocean floor that separates the thin oceanic crust from thick continental crust *Leaf ...

requirements for futures and options on futures. It was developed by the

Chicago Mercantile Exchange The Chicago Mercantile Exchange (CME) (often called "the Chicago Merc", or "the Merc") is an American derivatives marketplace based in Chicago and located at 20 S. Wacker Drive. The CME was founded in 1898 as the Chicago Butter and Egg Board ...

in 1988. SPAN is a portfolio margining method that uses grid simulation. It calculates the likely loss in a set of derivative positions (also called a portfolio), and sets this value as the initial margin payable by the firm holding the portfolio. In this manner, SPAN provides for offsets between correlated positions and enhances margining efficiency.

External links

* http://www.cmegroup.com/confluence/display/pubspan/SPAN+Overview Futures markets {{Econ-stub