The leu closed at 4.304/4.306 against the euro, compared to 4.286/4.288 at closing Wednesday.
It opened at 4.29/4.2925 per euro and later gained some minor ground on small euro sale orders.
Mid-session, the leu fell against the euro, following the regional trend, and the central bank set the reference rate at 4.298 units, 0.25% weaker on the day.
On the money market, overnight rates dropped to 4%-4.5% a year, from 5.1%-5.6% a year Wednesday.