Fifth Third Bancorp (FITB) did what it rarely does, buying another bank. While many of the big banks grew by acquisition, mergers and acquisitions in the financial services space have been few and far between since the financial crisis. In this deal, FITB is buying Chicago's MB Financial (MBFI) for about $4.7 billion, mostly in stock. To put the transaction into perspective, FITB has a market cap of $21 billion, so this transaction increases the size of the enterprise by 25%.
