The leu closed at 4.5222/4.524 per euro, from 4.485/4.488 per euro Wednesday.
The currency opened at 4.525 per euro and weakened to a low of 4.552 to the euro before partly recovering during late trading hours.
The leu had slid above 4.52 to the euro in after-hours trading Wednesday after the head of the US Federal Reserve said it was considering trimming state stimulus later in the year.
Investors reacted by selling risky assets to reduce their exposure. The leu’s peers in the region were losing up to 1% versus the euro at around noon Thursday.
In the local money market, overnight rates were flat at 2%-2.5% a year.