Explore
Close

Options & Futures Risk Arrays (OFRA)

OCC generates and distributes Options and Futures Risk Array (OFRA) parameter files that contain the product specifications, calculation parameters, and profit and loss arrays for certain exchange-traded futures and options cleared by OCC. The OFRA parameter files are in a format that is designed to be compatible with portfolio-based margining systems, including CME's PC-SPAN1 system.

The OCC-generated OFRA parameter files are currently published on CME's FTP SPAN Downloads pages and the files are listed under the relevant exchanges' file code. (File codes are noted below.) The calculation parameters in the files include outright scan ranges and spread rates which are used to calculate a portfolio's performance bond/margin.

Report

SPAN® is a registered trademark of the Chicago Mercantile Exchange. The Chicago Mercantile Exchange assumes no liability in connection with the use of SPAN by any person or entity.

Your acceptance of all cookies will permit robust site functionality. If you don't allow cookies, some features and functionality of OCC's site may not operate as expected. If you do not choose either cookie setting for our site, or if you close this window, this message will continue to display on each page you visit. Cookie settings can be controlled in your Internet browser to automatically reject some forms of cookies. For more details on cookies this site uses, see our OCC Site Cookies page. In addition to using cookies, we retain other information, including your Internet Protocol (IP) address, for the purposes listed in the Privacy Policy. Do not accept analytic cookies Accept analytic cookies