The national currency closed at 4.403/4.4035 per euro, from 4.406/4.4075 per euro a day earlier.
It opened flat on the day and gained modestly in early trading, hitting the day’s high of 4.025 per euro.
The central bank set the leu’s reference at 4.4044 to the euro, higher on the day.
Market participants believe the leu’s appreciation might have been prompted by a RON199.4 million deal on the Bucharest exchange.
A stake of 2.6% in investment fund Fondul Proprietatea (FP.RO) was sold in Bucharest earlier Friday, and the buyer could have bought lei to pay for the transaction. Large deals with Proprietatea stock are usually conducted by non-residents.
On the money market, overnight rates were at 4%-4.5% a year, little changed on the day.