Global banks have significantly changed their business models after the Global Financial Crisis, as a response to the regulatory changes as well as profitability pressures. I have researched on this topic for over two years, with the work being presented in GFSR October 2017 and senior management presentations. The major takeaways are below, with detailed empirical work on each topic.
I have also co-authored an IMF working paper proposing a new taxonomy of business model classification: based on four categories: 1) Line of business ; 2) Geographical reach; 3) Funding Mechanism and 4) degree of subsidiarization
While global banks have improved their capital and liquidity positions significantly, profitability remains elusive for a decent chunk of the system.