Citigroup's investment bankers are challenging Wall Street's best — and they may be on the verge of

Citigroup's investment bank has ambitions to compete for the top spots in the league tables. The bank has been mid-tier since the financial crisis, but recent improvements in mergers and acquisitions and equity-capital markets suggest the bank may be on the verge of a breakthrough. The bank may be firing on all cylinders, but industry analysts and top executives say Citi still has work to do to climb the final few rungs. "It continues to be a very, very competitive landscape, so we take...