On Tuesday, the reference rate was at 4.3237 per euro. Wednesday, the banking market was closed for the May 1 national holiday.
However, the leu gained 0.46% versus the US dollar, with the official rate set at 3.2923 units, from 3.3075 units on Tuesday.
The leu opened at 4.322/4.323 to the euro and traded in a narrow range in the first hour of trading on reduced volumes.
Later on, however, the volumes were lifted by corporate demand and the local currency slid towards 4.34 against the euro, dealers said.
On the money market, overnight rates were stable at 4.1%-4.6% a year.