Slovenian yields long tracked Portugal's, but in recent days they dropped towards Italy's and Spain's.

The spread on the German bunds, an eurozone benchmark, has narrowed to 94 basis points, according to electronic exchange MTS.

At the peak of speculations that Slovenia may need an EU bailout, in mid-2013, the yield was above 7%.

After Slovenia bailed out its banks in late-2013, the yield started gradually dropping.

The euro-wide trend has been similar as the prospects of a breakup of the eurozone has receded.