The SOFIX rose 0.26% to 516.0 points on Thursday, despite the fact that only two of its members saw their share price rise.
Fibank shares gained 4.11% to 3.04 levs on Thursday, partially offsetting a 6.41% plunge on Wednesday. Diversified group Chimimport [BUL:6C4] followed with a 3.01% rise to 1.71 levs.
The wider BGBX40 index, which tracks the 40 most traded shares on the Sofia bourse, edged down 0.05% to 110.43 points, while the BGTR30 index, in which companies with a free float of at least 10% have equal weight, fell 0.17% to 498.60 points.
Both indices were hit by a 3.81% decrease in the share price of power utility CEZ Distribution Bulgaria [BUL:3CZ].
The BGREIT index, which tracks the performance of real estate investment trusts, erased 0.25% to 127.66 points.
Total regulated market trading turnover dropped to 210,000 levs ($119,000/107,000 euro) on Thursday from 800,000 levs on Wednesday
(1 euro = 1.95583 levs)