The transformation of Citigroup, and similar changes at HSBC Holdings Plc and other global banks, isn’t just about cutting expenses. It’s also about looking for greater returns by focusing on the richest customers -- high-net-worth individuals, large corporations and institutional investors.
http://www.bloomberg.com/graphics/2016-global-banks/
Good link. My article may be of interest
https://steemit.com/money/@tee-em/bank-bail-ins-on-their-way-maaaaybe