New - Trade Type Opt-Out for CME ClearPort GUI and API

Effective Sunday, February 21 (trade date Monday, February 22), an opt-out by Trade Type and Exchange may be requested in addition to the currently allowed Trade Type opt-out.

These options allow customers to limit their trading to only those trade type or trade type and exchange combinations that they are permissioned to use. If a trade is submitted with a trade type or trade type and exchange combination that has been selected for opt-out, the trade will not pass validation, and a validation message will be sent.

For additional information, please see Trade Type Opt Out Validations.

To initiate a trade type opt-out, please contact Enterprise Application & System Entitlements (EASE) in the U.S. at +1 312 456 1560, Europe at +44 203 379 3802 or Asia at +65 6593 5536.

New - RC4 Cipher Suite

CME Group is committed to information security. To deliver the best security and customer experience, we are eliminating support of the RC4-based cipher suites for CME Group web-based applications, APIs, and services. Effective Saturday, March 12, customers using RC4 will not be able to access, connect, or establish sessions for CME Group products.

Customers following CME Group Web Browser Standards should not be impacted by this change. However, if customers connect through a proxy, they should ensure their proxy utilizes one or more of these CME Group supported ciphers:

• TLS_RSA_WITH_AES_256_CBC_SHA256
• TLS_RSA_WITH_AES_256_CBC_SHA
• TLS_RSA_WITH_AES_128_CBC_SHA256
• TLS_RSA_WITH_AES_128_CBC_SHA