The leu opened at 4.381/4.385 to the euro, from 4.3785/4.38 to the euro at Thursday closing.
It weakened further and traded at 4.3865/4.3875 per euro at around 10:10 local time (GMT0810).
Romania’s central bank set Thursday the leu’s official rate at 4.3844 per euro, from 4.387 per euro in the previous session.
On the money market Friday morning, overnight rates were at 4.5%-5% a year.