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CME will conduct a Dress Rehearsal for the ZAR JIBAR IRS to ZARONIA OIS Conversion in the UAT/New Release environment on Wednesday, October 7, 2026, beginning at 6:00 pm ET. This test simulates the Primary Conversion to be held on November 20, 2026 and includes the JIBAR 3M index tenor.

Please click the link below for the full advisory. 

CME Group is the world’s leading derivatives marketplace. The company is comprised of four Designated Contract Markets (DCMs). 
Further information on each exchange's rules and product listings can be found by clicking on the links to CME, CBOT, NYMEX and COMEX.

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