The leu closed at 4.393/4.394 per euro, from 4.388/4.3895 per euro Wednesday.
It had opened flat on the day but depreciated in early trade, amid higher demand for foreign currency.
The central bank set the leu’s reference at 4.3924 versus the euro, weaker from a four-week high of 4.3837 units a day earlier. Against the US dollar, the leu’s reference lost 0.14% on the day at 3.3554 units.
In the money market, overnight rates were at 1%-1.5% a year, amid excess liquidity.