Officials have also been weighing disconnecting Russia from the SWIFT international payment system, upon which Russia remains heavily reliant, according to two sources familiar with the discussions. This is being considered a "nuclear" option. The European Parliament passed a nonbinding resolution in the spring calling for such a move should Russia invade Ukraine, and the US has been discussing it with EU counterparts.
There is also serious discussion underway about denying Russian energy producers from debt markets in case of an invasion, per a senior administration official.


Basically go after the way Russia and it’s energy companies get money. Will it work? who knows? But hopefully Russia doesn’t press the world to find out.