As the U.S., the U.K. and the EU weighsanctions against Russia should it invade Ukraine, one idea under discussion involves cutting off access to a messaging system called Swift. So central is Swift to the international financial system that any such talk rattles bankers and diplomats alike.
      
    
    
      1. What is Swift?
Think of Swift, an acronym for Society for Worldwide Interbank Financial Telecommunication, as the Gmail of global banking.
 It delivers secure messages among more than 11,000 financial 
institutions and companies, in over 200 countries and territories. The 
message traffic -- 42 million a day on average last year -- includes 
orders and confirmations for payments, trades and currency exchanges. 
The member-owned cooperative, based just outside Brussels, was founded 
in 1973 to end reliance on the telex system. 
2. Why is losing access such a big deal? 
A
 country cut off from Swift can suffer significant economic pain. That’s
 what happened to Iran in 2012, when its banks lost access to Swift as 
part of European Union sanctions
 targeting the country’s nuclear program and its sources of finance. 
(Many of the banks were reconnected in 2016 after the EU took them off 
its sanctions list.) When Western nations threatened Russia’s access to 
Swift in 2014, Alexei Kudrin, a onetime finance minister close to 
President Vladimir Putin, estimated
 that it could reduce Russia’s gross domestic product by 5% in a year. 
Cutting Russia off from Swift could have ramifications for other nations
 as well, since Russia is a key energy supplier to Europe and countries 
rely on the Swift system to pay for fuel. Russian officials have 
repeatedly denied assertions that they intend to invade Ukraine. 
3. Are there alternatives to Swift? 
        
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Not
 really, or at least not yet. Since 2014, the Bank of Russia has run its
 own financial messaging system for Russian and foreign banks. But that 
one has only about 400 users. The People’s Bank of China in 2021 announced a joint venture with Swift that SWIFT Venture Isn’t Defensive Move, Ex-Banker Says" class="terminal-news-story" target="_blank">was seen in some quarters
 as an insurance policy against being cut off from the global financial 
system. One fear among Western officials is that banning countries from 
Swift would encourage the use of such alternatives. Digital currencies 
and the underlying technology have also been touted as a threat to Swift
 for several years, but they’re nowhere close to replacing it....
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