The leu opened at 4.52/4.523 to the euro, from 4.517/4.519 to the euro at closing Thursday.
It further weakened on high euro buy orders, touching an early low at 4.5315/4.533 per euro by 10:00 local time (GMT0700).
At the same time, the Hungarian forint and the Polish zloty were stable against the European currency.
The Romanian central bank set Thursday the leu’s official rate at 4.514 per euro, slightly stronger than 4.5168 per euro the day before.
On the money market Friday morning, overnight rates were stable at 4.75%-5.25% a year.