turkey’s banks are having their best day in six years as a bid by banco bilbao vizcaya argentaria sa for the rest of its turkish unit was received positively by investors and analysts the borsa istanbul banks index a gauge that tracks shares of turkish lenders was trading 95 higher as of 107 pm in istanbul the biggest intraday gain since november 2015 after bbva said it’s seeking to take full control of turkiye garanti bankasi as shares of garanti soared 99 to 1163 liras while gains for the lender and banking peers helped boost the country’s benchmark borsa istanbul 100 index 4 higher to a fresh record