Bank B2C marketing is pretty market-specific given different maturities and regulatory environments so I'd agree it's a hard call to undertsand the alignment at a global level. Certainly in Australia the whole financial services sector has more than a bit to do right now to sort its image out, but sponsoring a yacht race would be around #1345 on the top 1000 list of opportnities...The last financial sector team of substance to participate in this event was ABN Amro. Since the GFC the world's financial institutions have been on the nose. In Australia for instance there is a Royal Commission currently underway into their retail conduct. From what I read it is not pretty.
Whether this sector feel a privileged sport like sailing is the right place to wave the flag to alter that public perception I don't know. However I doubt it.
Not clear how truly global the big US banks are as anything other than a niche Investment Banking proposition in a lot of markets and how a VOR proposition suits their needs. ABN Amro was pretty focused on Asian market expansion at the time they sponsored a VOR Entry ( I know a guy in the bank involved in the deal) so it made tactical sense for them at that moment in time, but probably doesn't now. That's a lesson to consider when looking at any potential global sponsors - at any point in time there will be organisations with tactical objectives that may align to a VOR sponsorship and it's important to be able to identify them, but it would be a mistake to interpret these opportunities as opportunities to lock in enduring involvement in a RTW yacht race.
HSBC is an obvious potential global sponsor for a race or team but is currently very much on the nose right now. Same for many other global players.