Two years ago, the Chicago Board of Trade introduced an electronic gold futures contract and has parlayed it into a 19% share of the trading in gold futures.

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Last September, the New York brokerage Cantor Fitzgerald teamed up with the New York Cotton Exchange to develop an electronic exchange to trade American government-bond futures, striking at the core of the Board of Trade's franchise.

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

Two years ago, the Chicago Board of Trade (nyse: BOT - news - people ) introduced an electronic gold futures contract and has parlayed it into a 19% share of the trading in gold futures.

FORBES: Merc Oils Golden Engines