The blue-chip SOFIX index, which tracks the 15 most liquid shares on the Bulgarian Stock Exchange (BSE), closed 0.62% lower at 516.70 points after falling 1.88% in the previous session.
The broader BGBX40, which tracks the 40 most traded shares, ended 0.51% down at 103.39 points after closing 1.38% lower on Thursday.
Turnover on the regulated market decreased to 1.25 million levs ($784,500/639,100 euro) from 2.1 million levs on Thursday.
Fertiliser producer Neochim [BUL:3NB] was the top SOFIX gainer, closing 8.33% higher at 39.00 levs as 10 shares changed hands.
First Investment Bank [BUL:5F4] led the blue-chip decliners, closing 5.07% lower at 2.60 levs in a volume of 14,923 shares.
The BG-REIT index, which tracks the performance of the real estate investment trusts, added 0.47% to 96.95 points after closing 0.18% lower in the previous session.
The BG TotalReturn30 index, in which companies with a free float of at least 10% have equal weight, went up 0.10% to 405.69 points after closing 1.71% lower in the previous session.
(1 euro=1.95583 Bulgarian levs)