Philip van Doorn. To follow the writer on Twitter, go to http://twitter.com/PhilipvanDoorn.
Stocks sink into the red by mid-afternoon Wednesday after struggling for direction for much of the session.
Citigroup, whose operations span more than 160 countries, could move to a "network model" from a "hub-and-spoke model" for supplying importers and exporters with loans.
Citigroup, like its Wall Street rivals, profited from a frenzy of trading following Donald Trump's surprise victory as U.S. president.