Total turnover fell to BGN 31,842 /USD 15,533/ on the Bulgarian Stock Exchange on Friday from BGN 74,801 on Thursday but trading volume rose. Shares in zink and lead smelter Olovno-Tzinkov Komplex traded at BGN 25, up 3.31% from the previous trading on March 1, and Balkanpharma-Dupnitza drug plant traded at BGN 21.6, down 11.84% from previous deals on February 25. Total trading volume was 11,529 shares, compared with 4,166 on Thursday