Bulgarian shares indices closed mostly lower on Friday amid a higher turnover after a national holiday, stock exchange data showed. The blue-chip SOFIX index, which tracks the 15 most liquid and capitalised stocks on the BSE, ended the session 0.18% lower at 626.99 points. Car battery maker Monbat [BUL:MONBAT] was the biggest blue-chip loser, shedding 3.23% to 7.5 levs amid a turnover of 20,916 levs. Real estate investment trust Advance Terrafund [BUL:6A6] was the only blue-chip gainer, winning 1.48% to 2.06 levs in a volume of 50 shares. Total trading turnover on the Sofia bourse rose to 1.177 million levs ($696,700/601,800 euro) on Friday from 209,000 levs on Wednesday.