* Stocks lower despite Irish financial bailout
* Euro falls on worries of spreading debt problems
* US debt prices rise on risk-aversion, Fed purchases (Update with U.S. markets' open)
By Manuela Badawy and Naomi Tajitsu
NEW YORK/LONDON, Nov 22 (Reuters) - U.S. stocks fell while the dollar rose against the euro on Monday as initial optimism over Ireland's debt bailout gave way to concerns about the government's future and problems elsewhere in the euro zone.
Safe-haven U.S. government bond prices rose with help from another round of debt purchases by the Federal Reserve under its latest plan to aid the U.S. economy.
Gold, oil and other commodities slipped. The euro was off after it had earlier benefited from Ireland's rescue by the European Union and the International Monetary Fund aimed at shoring up its banking and budget crisis.
But the unpopular Irish government began to unravel after a call by Ireland's junior party for an early election in January, with the budget in doubt. For details, see [
].In addition, investors worried the rescue might not be effective in the long term and wouldn't stop markets from targeting Portugal, also facing severe debt problems. [
]."The risk of Ireland is somewhat off the table, but it puts the risk onto Portugal and possibly Spain, which represents a much bigger risk for the euro," said Omer Esiner, chief market analyst at Commonwealth Foreign Exchange in Washington.
Market participants say Portugal may be the next country forced to seek a bailout, which could reignite concerns about the stability of the euro zone.
The dollar was up against a basket of currencies, with the U.S. Dollar Index <.DXY> up 0.06 percent at 78.552.
The euro <EUR=> was down 0.25 percent at $1.365. Against the Japanese yen, the dollar <JPY=> was down 0.01 percent at 83.44.
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For an overview of Europe's debt struggles, click:
http://r.reuters.com/hyb65p
For an interactive euro zone debt crisis timeline, click:
http://link.reuters.com/nyx95q
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STOCKS SLIP
World stocks fell slightly on uncertainty about the outcome of Ireland's debt bailout and possible contagion of debt problems to Portugal and Spain.
The MSCI world equity index <.MIWD00000PUS> was off 0.5 percent while U.S. stocks fell, with the Dow Jones industrial average <
> easing 83 points, or 0.7 percent, at 11,119.The Standard & Poor's 500 Index <.SPX> fell 8 points, or 0.6 percent, at 1,192 while the Nasdaq Composite Index <
> was off 2 points at 2,516.Bucking the trend, Apple Inc <AAPL.O> and Amazon.com Inc <AMZN.O> rose.
Trading volume is expected to be down this week in light of the U.S. Thanksgiving Day holiday on Thursday.
The FTSEurofirst 300 <
> index of top European shares was down 0.7 percent while the Nikkei average < > ended the day up almost 1 percent, to a fresh five-month closing high as receding worries about the yen's strength encouraged a shift back to Japanese shares by foreign investors.The cost of insuring Irish sovereign debt against default rose on political uncertainty, and other peripheral euro zone credit default swaps were also higher.
The loan package for Ireland is expected to total 80 billion to 90 billion euros while the government puts the finishing touches to a 15 billion euro ($20.5 billion) austerity plan.
"Once we have the detail, we will see how well it works. But I am a little bit afraid that attention will shift towards Portugal and Spain," said Philippe Gijsels, head of research at BNP Paribas Fortis Global Markets in Brussels.
U.S. Treasuries rose as investors turned to safe-haven government debt before another round of government debt purchases by the Fed.
The benchmark 10-year U.S. Treasury note <US10YT=RR> was up 11/32, with the yield at 2.835 percent. The 2-year U.S. Treasury note <US2YT=RR> was unchanged with the yield at 0.518 percent. The 30-year U.S. Treasury bond <US30YT=RR> was up 26/32, with the yield at 4.197 percent.
The Fed on Monday will buy $7 billion to $9 billion of Treasuries in the 10-year maturity range as part of its quantitative easing program.
While the Fed will be buying again, the Treasury will be selling, offering $35 billion of 2-year notes as part of $99 billion of securities sales during the holiday-shortened week.
In energy and commodities prices, crude oil <CLc1> fell 71 cents, or 0.87 percent, to $81.27 per barrel.
Spot gold prices <XAU=> fell $2.00, or 0.15 percent, to $1351.00 an ounce, as the pick-up in the dollar undermined demand from investors for perceived safe-haven assets such as gold, which tends to weaken when the U.S. currency rises. (Additional reporting by Nick Olivari, Chris Reese and Chuck Mikolajczak in New York, Atul Prakash and William James in London; Editing by Kenneth Barry)