Notice to Members 2017-45

Date: August 23, 2017
Re: Customer Conformance Testing
Effective Date: August 23, 2017

OneChicago, LLC (“OneChicago”) is issuing this Notice to Members (“NTM”) 2017-45 to inform market participants that OneChicago does not support customers testing – including performance and risk control testing – in the OneChicago Production environment. Customers should do all testing in the User Acceptance Testing (UAT) environment. If assistance is needed with setting up a UAT account or with conducting the desired performance and risk control testing in UAT, please contact

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If you have any questions, please contact OneChicago Operations at (312) 883-4311 or