Russia’s assault on Ukraine triggered a surge of calls for Western allies to completely sever Russia from the global financial system by disconnecting it from the so-called Swift global payment system. Fear in places like the U.S. and Germany of potential collateral damage have put the idea on hold for now.
Besides halting a new natural gas pipeline and hurting Russia’s ability to raise debt, Western sanctions so far have blacklisted many of Russia’s biggest banks, affecting the majority of the country’s banking sectors assets. Those sanctions ban transactions with the targeted institutions, cutting off their access to U.S. dollars and financing.
https://www.wsj.com/articles/swift-banking-system-sanctions-biden-11645745909