As previously announced, the first date on which firms began using the new combined SPAN file was Friday, July 10.
At the request of clearing firms, and to provide firms with more time for testing, we are extending the date through which the existing separate (the “legacy”) SPAN files will be available. The existing separate files (the “legacy” files) will continue to be available through Thursday September 10. The first date on which they will not be available is Friday, September 11.
Note that this date is prior to the Monday, September 14 date on which trade processing for COMEX products will be integrated into the CME FEC application.
The new combined SPAN file contains data for all exchanges cleared by CME Clearing: Chicago Board of Trade, Chicago Mercantile Exchange, COMEX, New York Mercantile Exchange, Dubai Mercantile Exchange, and OneChicago.
The legacy SPAN files are the “ccl” files which contain data for CME and CBOT, and the separate NYMEX and COMEX files.