All indices of the Bulgarian Stock Exchange closed in negative territory on Tuesday, with First Investment Bank (Fibank) leading the blue-chip losers, bourse data showed. The SOFIX index, which tracks the 15 most traded and capitalised companies listed on the Sofia bourse, lost 0.44% to 565.56 points, after adding . 0.10% a day earlier. Its decline reflected losses in Fibank, drug maker Sopharma and financial leasing company Elana Agrocredit [BUL:0EA]. Fibank closed 4.55% lower at 3.15 levs, as 200 shares changed hands. Sopharma and Elana Agrocredit fell 0.90% and 0.88%, respectively.The BGBX40 index, which tracks the 40 most traded shares, closed 0.29% lower at 111.58 points, after falling 0.09% on Monday.