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At 1002 GMT, shares in Poland's third-largest lender Bank Zachodni WBK were up 5.2 percent at 387 zlotys ($105.44), its highest level since late 2014.
Poland's No.1 bank PKO BP was up 3.2 percent at highest level since September 2014. Meanwhile, mBank rose 4.3 percent.
"The boom continues," one Warsaw-based analyst said.