We have recently noted an increase in inquires from our member firms requesting retransmissions of GAINS data files. The following is a description of the GAINS data files, the days they are available and the approximate times they are transmitted. Please make sure your systems managers review the schedule below to ensure timely capture of the relevant files.

As indicated in the above chart, GAINS files will be produced on a daily, end-of-month, and end-of-cycle basis. Each of these files is described below.

1) The daily GAINS file will contain only records processed that day, not month-to-date records. The daily Adjustment, Account and Rate file will contain an accumulation of all adjustments, accounts and rates as of that day.

(2) The End-of-Month file for the previous month�s business is generated in the evening of the last business day of the month.

(3) The Preliminary End-of-Cycle file for the previous month�s business will be available the evening of the first day through the fourteenth business day of the month. (Please note that 3rd Party Billing records are only included in the preliminary End-of-Cycle file sent from the evening of the 7th through the 14th business days of the month.)

(4) The Final End-of-Cycle file for the previous month�s business will be available the evening of the fifteenth business day of the month. This file also includes 3rd Party Billing records.

Data File Timing

Please note that on the following days, two data files will be made available:

• On the last day of the month, both the daily and end-of-month files will be routed.
• On the 1st through the 14th business days of the month, both the daily and preliminary end-of-month files will be routed.
• On the 15th business day of the month, both the daily and final end-of-cycle files will be routed.

To review the current GAINS End-of-Cycle/Banking Calendar, please visit the Client Management web pages If you have any questions, please call Farris Oweimrin at (312) 648-4780 or email at foweimri@cme.com. Thank you!