Moody's has warned that it may downgrade Spain's credit rating over the coming three months because of the country's weak economic growth prospects as well as ongoing funding pressures.
In a statement, the ratings agency said any reduction of the current Aa2 rating was likely to be limited to one notch subject to there not being any "unexpected development". A one notch reduction would take the rating down to Aa3, still a healthy investment grade.
The ratings agency added that the funding pressures on Spain are likely to increase after last week's bailout package for Greece, which has set the "precedent" of private sector involvement. Banks are being asked to roll over and swap their Greek debt holdings in an effort to relieve the burden on the country.
Moody's said Greece's second bailout package "has signalled a clear shift in risk for bondholders of countries with high debt burdens or large budget deficits".
Spain has struggled with the aftermath of a collapsed real-estate boom and remains plagued by unemployment of more than 20%. Its cost of borrowing has been going up in recent days and is now standing at 6%, nearly 3.5% points more than the rate Germany is having to pay.
Though Moody's said its ratings are not affected by short-term market moves, it added that the risk of "a sustained rise in funding costs nevertheless has to be factored into the agency's analysis of a country's prospective debt affordability".
Usually, these reviews take up to three months to be completed.
Moody's downgraded six Spanish regions by one notch today. Some of the biggest regions, including Catalunya and Castilla-La Mancha, saw their ratings cut. Others, including the Basque Country and Galicia, have been placed under review for downgrade.
The agency said one of the reasons behind its downgrade review for Spain as a whole is the state of the regional governments.
"Moody's views positively that the central government has been successful in meeting its near-term fiscal consolidation targets, but the rating agency nonetheless notes that challenges to long-term budget balance remain due to Spain's subdued economic growth and fiscal slippage within parts of its regional and local government sector," the ratings agency said.