KIEV, June 12 (Xinhua) -- The National Bank of Ukraine, the country's central bank, said on Tuesday that continuation of cooperation with the International Monetary Fund (IMF) is key to Ukraine's stability in the near-term.

"If Ukraine receives two more tranches before the completion of the IMF program, the short-term and the medium-term risks to macroeconomic and financial stability will be reduced to the minimum," the bank said in its quarterly "Financial Stability" report.

The cooperation with the international financial institutions is particularly important for serving Ukraine's debts, which now pose the greatest challenge to the financial stability of the country, the report said.

Under the 17.5-billion-U.S.-dollar cooperation program with the IMF, which started in 2015 and will last till March 2019, the East European country has received about 8.7 billion dollars from the IMF.

The disbursement of the aid was suspended since April 2017 over Ukraine's failure to implement the agreed reforms.

On Monday, Ukrainian President Petro Poroshenko signed a law, giving which gives the greenlight to the creation of a supreme anticorruption court, a landmark reform demanded by the IMF.

In 2018-2020, Ukraine has to repay 20 billion dollars of its state debt.