At firm requests, the naming convention for Event Contract Masterfiles is being changed today, September 19, 2022, so that the date in the filename reflects the current date rather than the next trade date.
For example, the production filename for the master file generated this afternoon, Monday, September 19, 2022, will be CME.EventContracts.20220919.csv. The file contains data for contracts generated on September 19, for eligibility on trade date Tuesday September 20.
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