NEW YORK—The banning of certain Russian banks from the SWIFT international payment system could push central banks to enhance liquidity to offset missed payments, a Credit Suisse strategist said on Sunday. Western nations announced on Saturday a harsh set of sanctions to punish Russia for its invasion of Ukraine, including blocking some banks from the SWIFT international payments system. Major banks were working this weekend to get to grips with the raft of new sanctions and their full implications, while markets braced for more volatility as the measures could disrupt global trade and hurt Western interests as well as Russia. “Exclusions from SWIFT will lead to missed payments and giant overdrafts similar to the missed payments and giant overdrafts that we saw in March 2020,” Credit Suisse’s Zoltan Pozsar said in a note. Back in March 2020, the U.S. Federal Reserve enhanced efforts with other major central banks to ease …