The End of Banking as We Know It

By GRETCHEN MORGENSON

THE concept of the financial supermarket — the all-things-to-all-people, intergalactic, behemoth banking institution — bit the dust last week.

The first death notice came on Tuesday, when Citigroup, Exhibit A for the failure of the soup-to-nuts business model, said it was dismantling. Just over a decade after the deal-maker Sanford I. Weill tried to meld insurance, investment banking, mortgage lending, credit cards and stock brokerage services, the dissolution began.

Citigroup, it turned out, was too big to manage, too unwieldy to succeed and too gigantic to sell to one buyer.