The leu opened at 4.3075/4.3095 to the euro, weaker than 4.289/4.2915 at closing in the previous session.
Later, the leu started to recover slightly and, at around 10:00 local time, it was trading at 4.297/4.2994 against the European coin.
The central bank computed Wednesday a leu-to-euro reference of 4.2886 units, the weakest level seen since December 29, 2010, when the reference stood at 4.2914 units.
On the money market, overnight rates stood at 4.25%-5% a year, compared to 4.5%-5% a year previously.