Dimon's Jewel

A megamerger gives Bank One's hard-hitting CEO a chance to settle the score with Citigroup

For a guy who majored in psychology in college, Jamie Dimon has remarkably little patience for having his head shrunk. Ever since Dimon was pushed out of Citigroup in 1998 by CEO Sandy Weill, his mentor and friend, and became CEO of Chicago-based Bank One, Wall Streeters have speculated that he had something to prove. By turning the beleaguered lender into a financial-services powerhouse, the thinking went, Dimon would demonstrate just how essential he had been in helping build Citigroup. Perhaps he would even eventually merge Bank One with Citigroup and succeed Weill in a final act of redemption. But as...

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