Europe’s rescue fund cleared a major hurdle yesterday when German lawmakers voted overwhelmingly to beef it up, boosting markets as attention turned to a key international audit of debt-mired Greece.

Stock markets on both sides of the Atlantic greeted the news with relief as Chancellor Angela Merkel survived a vote that proved a hard-fought test of her political authority as the world looks to her to defuse the euro debt crisis.

Deputies voted by 523 to 85, with three abstentions, to expand the size and scope of the €440 billion European Financial Stability Facility (EFSF), handing it new powers, for example to buy sovereign bonds.

“This is a clear show of support for the common currency,” said Holger Schmieding, from Berenberg Bank.

The expansion also boosts the contribution of Germany, Europe’s paymaster, to €211 billion, though Finance Minister Wolfgang Schaeuble insisted there would be no more cash flowing from Berlin.

“We have agreed German guarantees of €211 billion for the EFSF. More is not necessary,” he said.

Ms Merkel’s spokesman Steffen Seibert said on microblogging site Twitter: “It is good that the Bundestag voted for an expanded EFSF rescue fund with such a large majority. Europe and half the world were looking to Germany.”

German dailies had dubbed yesterday “decision day for the euro” and “a fateful day” for Ms Merkel, amid hopes Berlin would offer solutions to a eurozone crisis that US President Barack Obama has said is “scaring the world”.

Despite fevered speculation in the run-up to the vote, Ms Merkel did not have to rely on the opposition to pass the Bill, staving off a potential political crisis that some feared could spark new elections in Europe’s top economy.

German Foreign Minister Guido Westerwelle said that with the vote, “the signal to our European partners is that you can rely on Ger-many”.

“Today’s decision is an important contribution to solving the debt crisis and to stabilising the euro,” Mr Westerwelle said.

Greek Finance Minister Evangelos Venizelos said the positive German vote made him optimistic it will secure approval in the remaining countries.

The European Commission also hailed the result with a spokesman for Economic and Monetary Affairs Commissioner Olli Rehn saying: “We welcome this new approval of the EFSF.”

The spokesman, Amadeu Altafaj, added that the rescue fund was still a “work in progress” but stressed Brussels hopes all eurozone states will have ratified the agreement by mid-October.

The main stumbling block now appeared to be tiny Slovakia, the eurozone’s second poorest country, where the junior coalition partner, Freedom and Solidarity, has repeatedly vowed to torpedo the EFSF’s passage.

As if to underline the importance of the fund’s new powers, Italy issued €7.85 billion worth of bonds yesterday with sharply higher interest rates, signalling renewed discontent on the markets.

Former British Prime Minister Gordon Brown warned of more doom ahead, saying in an opinion piece in the New York Times: “It has been clear for some time that... the euro cannot survive in its present form.”

Many banks were “close to insolvency,” argued Mr Brown, also a former finance minister, adding that “a far larger rescue fund – two, perhaps three trillion euros – is needed to stabilise the eurozone”.

Meanwhile in Athens, auditors from the European Union, European Central Bank and International Monetary Fund were meeting officials to decide whether to disburse eight billion euros of crucial aid for Greece. Eurozone Finance Ministers will likely decide on October 13 “whether the conditions are met for the next tranche to be disbursed,” Mr Schaeuble said in the parliamentary debate.

“I cannot say what this decision will be, I cannot anticipate the conclusions of the troika,” he added, referring to the international auditors.

As staff associations occupied nearly a dozen ministry buildings in protest at the crippling austerity measures needed to tackle the country’s debt pile, Athens says it has enough cash to pay the bills until the end of October.

Greek Prime Minister George Papandreou is to meet Nicolas Sarkozy in Paris today, the French President’s office said, as Athens tries to secure support for disbursing the rescue funds.

As Greece waits for the funds from a first €110 billion bailout approved last year, analysts have already turned their attention to a much-needed second €159 billion Greek rescue package agreed in July.

“Getting a second bailout package for Greece through parliamentary proceedings in Berlin may not be easy, to put it mildly,” said analyst Schmieding.

“Putting taxpayer money at stake to support Greece is a tougher sell than to strengthen a rescue shield for Europe,” he added.

Greek austerity measures have met fierce resistance and Athens was paralysed for three days this week by a transport strike, with a general strike scheduled for October 19.

Following the German vote, Frankfurt’s DAX 30 index was up 2.15 per cent while the Dow Jones index in the US went up by a similar amount.

The euro was up around one per cent against the dollar.

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