The leu opened at 4.3685/4.37 to the euro, from 4.3655/4.3675 to the euro at Wednesday closing.
It further weakened slightly, trading at 4.369/4.371 against the euro at around 10:10 local time (GMT0710).
The Romanian central bank set Wednesday the leu’s exchange rate at 4.3668 per euro, the strongest rate in five weeks.
On the money market Thursday morning, overnight rates were stable at 1.2%-1.7%, as liquidity surplus persists.