The central bank bought treasuries from three lenders and will sell them back March 12.
Last week, the central bank injected RON5 billion into the market in a similar operation.
Central bank governor Mugur Isarescu said the bank has been adding liquidity to the market on a regular basis because some of the local lenders have difficulties borrowing from their peers. The central bank has been injecting cash into the market every week since October.
On the money market Monday, weekly rates were at 2.7%-3.2% a year, down from 3.1%-3.6% a year Friday. (EUR1=RON4.3514)