The bourse's blue-chip BELEX15 ticked down 0.26% to 629.06 points on Friday after losing 0.89% in the previous trading session.
The broader BELEXline edged down 0.56% to 1,233.62 points after backing off 0.32% on Thursday.
A update of the joint SRX index of the bourses in Belgrade and Vienna for Friday was not available on the BELEX website.
Twenty-five issues lost ground, 15 climbed, while the share prices of 23 companies remained unchanged on Friday.
Total turnover on the BELEX rose to 136.6 million dinars ($2.1 million/1.4 million euro) from 74.4 million dinars on Thursday.
Blue chip AIK Banka inched up 0.33%, closing at 2,467 dinars in the day's highest turnover of 84.4 million dinars.
Drug maker Velefarm rose 3.09% to 1,200 dinars in the second highest turnover of 16.5 million dinars.
In single-price trading, wheat processor Zitosrem surged 20% to 1,380 dinars in the third highest turnover of 8.3 million dinars.
Lender Jubmes Banka led the sliders, tumbling 7.39% to 16,500 dinars.
Blue chip lender Agrobanka, which led the advancers, added 3.55% ending at 8,015 dinars.
(1 euro = 95.8783 Serbian dinars)