The development is a consequence of last year's Dodd-Frank law that included a cap on merchant debit-card fees, known as interchange.

WSJ: Debit-Card Fee Cap Has Nasty Side Effect

As the city's law firms have grown, so have its accountancy, merchant-banking and venture-capital businesses.

ECONOMIST: Leeds: Streets paved with brass | The

Many observers, like Douglas Farah, who co-wrote a book on Bout called Merchant of Death, believed Bout was operating with impunity in an international arena that was literally above the law.

FORBES: The Merchant of Death is Coming to America