CME Clearport (NYMEX) CME ClearPort (formerly NYMEX ClearPort) is a set of clearing services open to OTC market participants. The services are designed to help customers mitigate counterparty credit risk. The New York Mercantile Exchange’s ClearPort platform, launched in 2002, was re-named CME ClearPort after the CME Group acquired NYMEX Holdings, Inc. in a transaction that closed on Aug. 22, 2008. The CME links to the ClearPort front-end system for clearing OTC energy and metal contracts.