By Derek Hunter
Before the financial crisis, the consensus was that global bank behemoths would prosper from diversifying into emerging markets while maintaining their stable operations in developed countries. Institutions like Citigroup do everything from residential lending in Maryland to junk bond trading in India. But after the crash, and its regulatory backlash, that presumption is questionable at best. The Economist analyzes the weakening model of global banking institutions like Citigroup, and questions whether it can persist in the post-crisis regulatory landscape.