The leu opened flat at 4.173/4.175 to the euro, but further lost ground, hitting an early low at 4.1845 to the euro.
Dealers said the leu could return to gains later in the day, as banks are betting on a stronger rate, of around 4.1 per euro.
Elsewhere in the region this morning, the leu’s peers were losing 0.1% on average against the euro.
The central bank set the leu’s reference at 4.1719 per euro Wednesday, the lowest rate since March 17.
On the money market Thursday morning, overnight rates were at 3%-3.5% a year.