The credit-rating firm DBRS on Friday downgraded Greece’s issuer rating to CCC from B, citing a “further increase in uncertainty over whether Greece and its creditors will reach an agreement on a program that restores macroeconomic stability and improves Greece’s cash position.”

The negative news was followed by Fitch Ratings, which affirmed its CCC grade for the country.

Meanwhile, the yield on Greek 10-year bonds ended on Friday up 20.9 basis points, to finish at 10.76 percent. Bloomberg said the yield reached 13.93 percent in April, the highest since December 2012, after dropping to a low of  5.52 percent in 2014. The benchmark Athens Stock Exchange General Index closed Friday 2.6 percent lower.

Earlier, the Bank of Greece announced that the Greek central government’s cash balance posted a deficit of 1.49 billion euros in the January-April period, up from a deficit of 1.27 billion euros over the corresponding period in 2014.

The Greek central bank announced that over this period the ordinary budget revenue totalled 13.46 billion euros, compared to 14.43 billion in the corresponding period of 2014.