PRAGUE (Reuters) -Komercni Banka, the Czech Republic's third-biggest bank, said on Friday it expected to see a material impact from the Czech National Bank's decision to stop remunerating required minimum reserves, as the banking sector braced for the change. Another Prague-listed lender, MONETA Money Bank, also expected a fall in net increase once the change took effect next month. The two banks were the biggest fallers on the Prague Stock Exchange, falling more than 2%.