The previous negative record, of 4.6397 to the euro, was set on July 24.
The leu fell against the US dollar as well and the central bank’s indicative reached 3.7974 units, weaker by 1.2% on the day.
Romania’s currency opened at 4.62 per euro, slightly higher from 4.63 to the euro at Thursday close.
However, it soon turned to losses and fell to an all-time low of 4.6505 per euro in interbank trading, with investors reacting to news that the Supreme Court has delayed its decision on a referendum on whether suspended President Traian Basescu can retain his position, thus prolonging the political crisis that has engulfed Romania in early July.
The leu has lost 4.4% against the euro over the past month. Since January, the currency weakened by 7.6%.
Central bank governor Mugur Isarescu said Thursday that the leu’s exchange rate has been negatively affected by capital outflows last month, amid political tensions at home and a worsening economic and financial climate in Europe.
However, the bank has sufficient room to support the national currency, Isarescu said, adding that a clarification of the existing political situation would be of “great help”.
Market participants believe the leu will remain under downward pressure over the coming period.
In the money market Friday, overnight rates were flat at 4.8%-5.3% a year.