March 1 (SeeNews) - Croatia's biggest lender, Zagrebacka Banka [ZSE:ZABA-R-A], said it turned to a consolidated net loss of 148 million kuna ($21.1 million/19.4 million euro) in 2015 from a net profit of 1.14 billion kuna a year earlier, due to the new law requiring domestic lenders to convert all Swiss franc-denominated mortgage loans into euro at customers' request.