The Bulgarian Stock Exchange blue-chip SOFIX index dropped 0.36% to 582.98 points on Tuesday, extending its losing run to five consecutive sessions.Sofia stock indices were hit by a 4.76% drop in the share price of blue-chip diversified group Stara Planina Hold, which ended the session at 6.0 levs. The company erased all its gains in the two trading sessions after the company announced its consolidated financial report for 2018.The BGBX40 and the BGTR30, which count Stara Planina Hold as a member, both closed lower.The wider BGBX40 index, which follows the 40 most traded and capitalised stocks, ended 0.12% lower at 116.23 points.The BGTR30, in which companies with a free float of at least 10% have equal weight, slid 0.15% to 504.33 points.The BGREIT index, which tracks real estate investment trusts listed on the Sofia exchange, lost 0.15% to 120.53 points.Total trading turnover on the BSE regulated market soared to 2.8 million levs on Tuesday from 255,000 levs in the preceding trading session.The Sofia exchange did not operate on Monday due to a national holiday.