Brokerage is a commodity.

FORBES: Pensions and Brokerage: The Brokerage Battlefield Revisited (October 1, 2000)

With massive layoffs and once-flush brokerage firms finding cash a less abundant commodity, disputes over getting paid have taken on new meaning.

FORBES: Former Wedbush Rep Wins Incentive Compensation Case

Mr Arbor has asked the Commodity Futures Trading Commission, the industry regulator, to block the proposed exchange, claiming that Cantor, as a brokerage, has a conflict of interest.

ECONOMIST: Chicago??s ancient futures exchanges are showing their age