Mohammed El-Erian has resigned as chief executive of Pimco. He is now going to write a book, spend time with his family, and - quite possibly - spend longer in bed. According to the Financial Times, El-Erian has been getting up at 4.15am for years. That sounds likely to create some strain.
However, one anonymous 'institutional equities professional', known only on Twitter as CT_Osprey, says 4.15am starts are standard in financial services. If you need to be at your desk by 7.30am, or far before, the Twitter thread below, republished with his permission, may be of interest.