The 24-share benchmark CROBEX index lost 0.29% to 2,292.23 points after rising 2.46% on Wednesday.
The narrower blue-chip index, CROBEX10, which tracks the 10 leading companies in terms of free-float market capitalisation and liquidity, closed 0.85% lower at 1,196.73 on Thursday.
The CROX index, which tracks the 12 most traded stocks on the ZSE and is calculated by the Vienna bourse, rose 0.30% in euro terms to 1,398.32 points.
ZSE's total turnover in floor trading fell to 43.8 million kuna ($9.0 million/6.0 million euro) from 46.7 million kuna on Wednesday.
The fixed-income CROBIS index edged down 0.02% at 90.19 points.
(1 euro=7.253 Croatian kuna)