* Euro falls to $1.2860 on EBS, more losses seen
* Portugal under pressure to accept financial aid package
* Bond auctions in Spain, Italy, Portugal under scrutiny (Recasts lead, adds detail, updates prices)
By Wanfeng Zhou
NEW YORK, Jan 10 (Reuters) - The euro reversed losses on Monday that had driven it to a four-month low against the dollar, though gains were expected to be short-lived amid worries about the ability of indebted euro zone countries to raise funds and speculation that Portugal will need a bailout.
The recovery in the euro, which fell as low as $1.2860 <EUR=EBS> on trading platform EBS, was partly helped by gains versus the Swiss franc on speculation the Swiss government may take measures to rein in currency strength.
"We see a further escalation in the European debt crisis, and a substantially weaker euro," said Stephen Jen, managing director of macroeconomics and currencies at BlueGold Capital Management LLP in London. "There is no silver bullet because the underlying problems are 'knotted.'"
Analysts said the euro's close below its 200-day moving average last week at $1.3075 was particularly bearish. The next key downside support lies at $1.2795, the 61.8 percent Fibonacci retracement of its rally from June to November.
A senior euro zone source told Reuters on Sunday pressure was growing on Portugal from Germany and France to seek financial help from the European Union and International Monetary Fund to prevent the debt crisis spreading. Germany denied the report.. See [
] [ ]Portugal, Italy and Spain are all due to tap the bond market for funds this week, and investors were nervous about whether these highly indebted countries will be able to raise funds at sustainable levels in 2011. See [
]The euro <EUR=> last traded up 0.3 percent at $1.2953, though it remained down about 3.3 percent in the first six trading sessions this year. Traders reported option barriers at $1.2850 and sovereign buy orders just above that level.
Against the Swiss franc, the euro rose 0.3 percent to 1.2526 francs. <EURCHF=EBS> The Swiss currency weakened after a report said the Swiss government will meet business leaders and trade unions next week to discuss the implications of the record-strong Swiss franc. [
]"You could argue the euro is a little bit oversold on the short term," said John McCarthy, director of foreign exchange trading at ING Capital Markets in New York. "There's been a little bit of euro buying and profit-taking on short euro crosses. But the euro is still relatively well offered. There's obviously renewed concern about Portugal."
PORTUGAL IN FOCUS
The growing pressure on Lisbon follows a sharp rise in Portuguese 10-year bond yields at the end of last week to euro lifetime highs above 7 percent, as investors worried about the prospect of up to 1.25 billion euros of bond supply Portugal will offer at an auction on Wednesday.
Analysts said that if investors judge that the price Lisbon needs to pay to get funds is too high to sustain borrowing in the long term, Portuguese bonds may sell off quickly, forcing the country to seek emergency EU and IMF funds.
You-Na Park, currency strategist at Commerzbank, said there's a "realistic possibility" that Portugal will not manage to generate the funds required for 2011 without foreign aid.
But she added, "Even if Portugal does seek a bailout, the market may well turn on Spain as the next candidate."
Kathleen Brooks, research director at FOREX.com, said there's a risk the euro could revisit the low $1.20s area it hit in 2010, but losses could be slowed by Asian reserve diversification flows.
China voiced support for European government bonds on Friday as crucial investment choices for its foreign exchange reserves. [
]The dollar index, which measures its performance against a basket of major currencies, fell 0.2 percent to 80.854, having risen to a high of 81.313--its highest since early December.
The dollar slipped 0.4 percent to 82.72 yen <JPY=EBS>. (Additional reporting by Neal Armstrong in London; Editing by Leslie Adler)