NEW YORK (CNNMoney) -- Standard & Poor's said Monday that it placed 15 members of the euro currency union on review for a possible downgrade as the debt crisis in the eurozone continues to worsen.
The blanket warning applies to AAA-rated nations such as Germany, France, the Netherlands, Austria, Finland and Luxembourg, the U.S.-based credit rating agency said in a press release.
But the review does not change anything for two members of the 17-nation monetary and currency union. Greece's credit rating currently reflects a high risk of default, and Cyprus was already under review.
S&P said the review was prompted "by our belief that systemic stresses in the eurozone have risen in recent weeks to the extent that they now put downward pressure on the credit standing of the eurozone as a whole."
The agency sees five factors behind the current debt crisis: Tightening credit conditions, rising yields on bonds issued by top rated sovereigns, ongoing political deadlock over how to deal with the crisis, high levels of government and household debt, and the rising risk that Europe will suffer an economic recession next year.
France is already seen as the most likely candidate to be stripped of its AAA status. But the decision to review Germany, the euro area's most creditworthy nation, points to the severity of the crisis.
Other euro area nations have already seen their ratings slashed by S&P, a division of McGraw-Hill. Most recently, S&P cut its rating on Belgium late last month.
Italy and Spain have also suffered deep downgrades this year, although both nations retain investment grade ratings. Ireland and Portugal are also clinging onto investment greade ratings, but the rating on the bailed-out nation of Greece is already at junk status. (See correction below)
A downgrade of France or another of the region's top rated nations would have serious consequences for the European Financial Stability Facility. The EFSF, a government backed bailout fund, could lose its AAA rating if the nations that stand behind it are downgraded.
The warning from S&P, which comes two weeks after Moody's warned that the credit ratings of all European nations are at risk in the crisis, was issued as politicians prepare to meet later this week for another summit to save the euro.
France and Germany reached an agreement Monday on a new "fiscal pact" to enforce fiscal discipline across the eurozone and help prevent a repeat of the current meltdown.
Government leaders from the 27 member European Union are expected to discuss ways to increase economic and political integration at the last scheduled meeting of the European Council on Thursday and Friday in Brussels.
Also this week, the European Central Bank will hold its regular policy meeting on Thursday in Frankfurt. The bank is widely expected to cut interest rates as the European economy continues to rapidly deteriorate.
Investors have been pressuring the ECB to step up its efforts to stabilize shaky euro area governments by committing to large and unlimited purchases of sovereign debt.
While the bank has resisted, president Mario Draghi hinted last week that the ECB could do more if governments commit to a "fiscal compact."
Correction: An earlier version of this article incorrectly reported that Ireland and Portugal have already been cut to junk status.
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