At 08:35 in Lisbon, 10-year interest rates rose to 3.136%, compared to 3.130% on Friday.

Five-year interest rates fell to 2.747%, compared to 2.751%.

In the opposite direction, two-year interest rates rose to 2.969%, compared to 2.946%.

Interest rates in Spain rose across all terms, while those in Italy rose in the shortest term and fell in the two longest terms.

Interest rates in Greece rose at two and five years and fell at 10 years.

Interest rates on German 10-year bonds, considered the safest in Europe, rose to 2.519%, compared to 2.515% on Friday.

Sovereign debt interest rates in Portugal, Greece, Ireland, Italy and Spain at 08:35:

2 years... 5 years...10 years

Portugal

20/05.......2.969...2.747.....3.136

17/05.......2.946...2.751.....3.130

Spain

20/05.......3.191...2.988.....3.271

17/05.......3.189...2.987.....3.269

Greece

20/05.......2.842...3.081.....3.509

17/05.......2.828...3.070.....3.511

Ireland

20/05.......3.011...2.751.....2.901

17/05.......3.000...2.762.....2.897

Italy

20/05.......3.459...3.386.....3.808

17/05.......3.456...3.388.....3.809

Source: Bloomberg Bid values (interest rates required by investors to buy debt) compared to the close of the last session.

Read also: Portugal's debt interest rates rise at two, five and 10 years (Portuguese version)