Client Management Advisory Notice
From | Clearing House / Client Management Operations
Subject | Old CME-OCC X-Margin SPAN files - Discontinued Friday, December 13, 2002
Effective Date | 12/04/02
Notice Number | CMO#0312
Currently, CME publishes special CME-OCC cross-margining SPAN files. These SPAN files are used for calculating performance bond requirements for portfolios participating in the cross-margining program between CME, the Options Clearing Corporation, and the New York Clearing Corporation for futures and options on broad-based equity index futures and options. Since the early 1990's, this file has been published in two different formats: the unpacked format, and the packed format. Beginning in 2000, the file has also been published in the expanded-unpacked format and the XML format. These newer formats are enhanced over the original formats in that they use the actual 3-byte product code for the OCC-cleared index options, rather than a 2-byte alias for the actual OCC product code. All users of the CME-OCC cross-margining SPAN files have now switched from using the older unpacked or packed formats to the newer and better expanded-unpacked and XML formats. Accordingly, CME will cease publishing the two older formats -- the unpacked format and the packed format -- on Friday, December 13th. SPAN Files on the Firm FTP Server: � The unpacked-format and packed-format files being eliminated are identified with the following naming convention: F999.CMEDATA.CSPN, where 999 is the firm number. � The expanded-unpacked-format which replaces the older format is identified as F999.CMEDATA.EXPSPAN. SPAN Files on the Internet FTP site: On CME's Internet FTP Web-Site at ftp.cme.com, the files are located in the /pub/span/data/xma directory: � The unpacked-format file being eliminated is identified as xmammdds.zip, where mmdd is the two-digit month and day numbers, or as xma.ccyymmdd.s.par.zip, where ccyymmdd is the full four-digit year, two-digit month and two-digit day numbers. � The new expanded-unpacked format file is identified as xm-cme-occ.ccyymmdd.s.pa2.zip. � The new XML-format file is identified as xm-cme-occ.ccyymmdd.s.spn.zip. For more information, please contact Dale Michaels (312-930-3062), Jodi Abudardham (312-648-5427), or Ed Gogol (312-648-3674). Thank you.