ROME (AFP) ― Even as the global economic community hailed an agreement to rescue Spain’s stricken banks, there was concern in Rome on Sunday that investors could now begin treating Italy as the next weak link in the eurozone.

Those fears have been fueled by a report from Moody’s ratings agency warning that Spain’s banking troubles could be “a major source of contagion” for Italy where lenders are also highly reliant on European Central Bank funding.

“Italy is now the only country in difficulty that has not had to ask for a bailout,” said Federico Fubini, a columnist for the top-selling Corriere della Sera daily, after aid packages for Greece, Ireland, Portugal and now Spain.

Without a stabilization in borrowing costs on the debt markets for Italy and Spain and a Europe-wide agreement on the banking system, Fubini said that “the uncertainty will be very high and scrutiny of Italy will grow ever higher.”

Italy’s borrowing costs are lower than Spain’s ― indicating greater investor confidence ― but they have been moving in line with Spanish ones.

The rate on benchmark 10-year Italian government bonds on Friday rose to 5.745 percent, while the rate on Spanish bonds went up to 6.192 percent.

Carlo Bastasin, writing in business daily Il Sole 24 Ore, was also wary on the Spanish deal, saying: “For Italy this represents the removal of the filter that separates our country from the group of other countries in difficulty.”

As has been the case in Spain, Italian banks have bought up large amounts of domestic government bonds in recent months, making up for reduced foreign demand but also increasing their exposure to the sovereign debt crisis.

The Corriere della Sera daily said concern about possible contagion drove Prime Minister Mario Monti, who is also the finance minister, to play a key role in negotiations leading up to the Spanish bank rescue announced Saturday.

“Monti lobbied for Spain not to be lumbered with an austerity plan like the ones for Greece, Ireland and Portugal,” the report said. A headline in the daily described the deal as a “move to stop the contagion.”

But Daniel Gros, head of the Center for European Policy Studies in Brussels, warned: “After Spain, there will not be the margins to help Italy. It will be defenseless and forced to help itself if the situation deteriorates.”

“For the moment it is holding up. The bond auctions are going very well and the (primary) surplus is significant, but it needs to make more effort,” the economics expert said in an interview with La Stampa daily.

Italy’s banking system has proved resilient and has required no domestic or foreign bailouts since the financial crisis first broke in 2008, while several major banks have launched successful recapitalizations in recent months.

Italian banks also lack the high property market risk of Spanish ones.

But the picture has darkened since Italy’s economy fell back into recession in the second half of last year and Moody’s last month downgraded 26 Italian banks including the two biggest ones ― UniCredit and Intesa Sanpaolo.

At the same time, former European commissioner Monti’s ambitious program of austerity measures and structural reforms has encountered growing public opposition as some of the measures including tax increases begin to bite.

In a speech on Saturday ahead of the Spanish rescue announcement, Bank of Italy governor Ignazio Visco said: “With the political deadlock in Greece and severe difficulties in the Spanish banking sector, tensions have re-emerged.”

“For Italy, the emergency is not over,” he said, emphasizing the need for reforms that could lead to “a surge in confidence” in Italy’s growth potential and for fiscal discipline “even if at the cost of some short-run difficulties.”