Employees of each company hold a minority stake in that subsidiary, and so have a powerful motive to sell services to one another, as well as to outside customers.

FORBES: Silicon Prairie Dog

Realistically, if megabanks were forced to hold capital equal to 15 percent of assets rather than 8 percent, they would have a powerful incentive to reduce their size.

FORBES: Fixing 'Too Big To Tolerate' Banks