The Bulgarian Stock Exchange blue-chip index ended the first trading session of this month 0.30% lower at 583.98 points, dragged down by a 4.58% plunge in the share price of First Investment Bank (Fibank). The SOFIX dropped 1.46% overall in January, but ended the month's last trading session with a strong 1.82% rise prompted by Fibank's 9.12% share price gain on January 31. There were only two other blue-chip losers on Friday - drug maker Sopharma and Bulgarian Real Estate Fund REIT, which ended 0.57% and 0.53% lower, respectively. The BGREIT, which tracks real estate investment trusts, lost 0.10% to 120.65 points solely due to the decline in Bulgarian Real Estate Fund REIT's share price. The BGREIT ended 2018 at an all-time high of 121.07 points. The wider BGBX40 index and the equally-weighted BGTR30 index also ended lower on Friday, as Industrial Capital Holding fell most among their members, followed by Fibank. Total trading turnover shrank to 180,000 levs ($106,000/92,000 euro) on Friday from 1.4 million levs on Thursday.