A block deal with shares in Medika local pharmaceuticals producer almost trippled turnover on the Bulgarian Stock Exchange (BSE) to BGN 149,870 /USD 74,500/ on Wednesday from Tuesday's BGN 50,459. Medika shares surged 140% from previous trading on December BGN 6 to 12 each as a block of 10,000 shares, representing 3.56% of the company's capital, changed hands between two privatisation holdings. Oil refinery LUKoil Neftochim traded at BGN 10.50 and 10.70 per share, down 1.58% on average from Tuesday, and Bulgartabak Holding tobacco monopoly fell 1.64% from Tuesday to BGN 30 per share. Total trading volume fell to 18,739 shares from Tuesday's 27,124