With big bank HQs gone from town, CME—created by the 2007 merger of the Chicago Merc and the Board of Trade—represents the city’s last claim to global financial significance. Its chief proved he knows how to play that card when he demanded and, in December, won a state tax break worth an estimated $85 million. If only Donohue’s company had been as successful at regulating futures firm MF Global, where $1.2 billion in customer funds went missing last year.
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Photograph: Bob Stefko