Kansas City Board of Trade

The Chicago Climate Exchange (CCX) was North America's first and only voluntary, legally binding greenhouse gas emission reduction and trading system. Founded in 2003 by economist Richard Sandor, CCX allowed member companies to make binding commitments to reduce carbon emissions and trade Carbon Financial Instruments (CFIs). Acquired by ICE (Intercontinental Exchange) in 2010, CCX ceased operations the same year after voluntary carbon credit prices collapsed following the failure of US cap-and-trade legislation.

Houston Street Exchange was an early electronic over-the-counter (OTC) energy trading platform based in Houston, Texas, offering spot and forward contracts for crude oil and refined petroleum distillates. Launched in the late 1990s during the initial wave of online energy trading, the platform ceased operations in the early 2000s following the collapse of energy trading markets in the wake of the Enron scandal.

The U.S. Futures Exchange (USFE) was a Chicago-based electronic futures exchange founded in 2004 by a consortium including Goldman Sachs, Man Financial, and others, with the goal of introducing competition into the US Treasury and energy futures markets dominated by the CME and CBOT. Despite significant backing and low-cost trading incentives, USFE failed to attract sufficient liquidity from established market participants and closed operations in December 2007 after roughly three years of trading.

The Sioux City Grain Exchange (SCGX) is a local cash grain market based in Sioux City, Iowa, serving the Northwestern Iowa and surrounding tri-state agricultural region. As a traditional open-outcry grain exchange, it historically provided price discovery and merchandising services for corn, soybeans, and wheat. The exchange represents one of the regional grain markets that predates the consolidation of US grain pricing into national futures exchanges such as CME Group's CBOT.