The American Stock Exchange (AMEX) was one of the largest options exchanges in the world. In 2008 it was acquired by NYSE Euronext.

During 2002–2009 Cinnober served AMEX with their options trading platform ANTE (Amex New Trading Environment) based on the TRADExpress Trading System. ANTE was specifically customized to enable a hybrid market structure, combining an auction market system with the speed and efficiency of an electronic trading platform. In 2009, after the acquisition by NYSE, the AMEX options market was transferred from being traded on ANTE to NYSE technology.

ANTE was a high performance system managing over 600 million quotes per day and quote volumes exceeding 50,000 quotes per second at peak levels with capacity to handle much more, despite the vast complexities of the hybrid market model.