He became the first independent trader to trade financial products at Shatkin Trading Company, which led to a partnership to arbitrage US Treasury cash/futures. In 1980 Cahnman established a CBOT clearing firm, Aardvark Financial, which became a clearing member of the Chicago Mercantile Exchange in 1981 and was renamed TransMarket Group in 1984.
An early proponent of electronic trading, he became one of the relatively few to successfully adapt his floor trading skills to an electronic platform. He has traded electronically on CBOT, CME, LIFFE, BrokerTec, E-speed and Eurex and has trained and employed many highly successful traders over his career.
Cahnman has a bachelor of science degree in mathematics from DePaul University and a master of business administration degree from Tulane University.
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