* Euro loses steam after reaching one-week highs
* Spanish and Italian bond sales next major focus
* Hopes for more policy response to debt woes help euro
* Aussie soft after disappointing jobs data
By Hideyuki Sano
TOKYO, Jan 13 (Reuters) - The euro slipped from one-week highs on Thursday after short-covering triggered by Portugal's successful debt auction the previous day ran its course and traders looked to debt sales by Spain and Italy.
Portugal's fund raising in the bond market sent bears scrambling to buy back the euro, pushing it above its 200-day moving average, but many hurdles remain for the currency, starting with bond sales by Spain and Italy later in the day.
Some analysts say hopes for further policy responses by the euro zone to tackle the debt woes are helping the euro amid talk of increasing rescue funds, but they caution it is too early to bet that anything substantial will be agreed at a eurogroup finance ministers meeting early next week.
"At best the euro could rise to around $1.33. But fundamentally, the euro still has headline risks. Even if investors' risk appetite grows, they have many other currencies to buy," said Minoru Shioiri, manager of forex at Mitsubishi UFJ Morgan Stanley Securities.
"The euro's downtrend will end only when there is a more negative story on the dollar," he said.
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Multimedia coverage on Euro Zone Crisis page on Top News:
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Portuguese debt spreads: http://r.reuters.com/suf75r
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The euro slipped 0.24 percent on the day to $1.3100 <EUR=>, a day after short-covering drove the currency as high as $1.3145, well above its 200-day moving average of $1.3070 and Monday's four-month low around $1.2860.
Resistance lurks at $1.3152 for euro/dollar, a 50 percent retracement of the recent fall from around $1.3435 to $1.2870, while the 200-day moving average will provide support.
Talk of Japanese investors' buying also helped to push the euro above 109 yen <EURJPY=R> for the first time in a week. It later slipped to 108.82 yen but remained above the four-month low of 106.83 yen hit earlier in the week.
The currency's gains so far this week have been driven in part by budding speculation that euro zone policy makers may be inching closer to step up safety measures for the currency bloc's troubled countries, said Keiji Matsumoto, a strategist at Nikko Cordial Securities.
"Euro zone policy-makers are moving more pre-emptively these days. To stop debt crisis contagion to Spain from Portugal, they really need to enlarge their rescue funds. It seems they are moving in that direction," Matsumoto said.
The European Commission and euro zone countries are discussing changes in the size and scope of operations of the European Financial Stability Facility, Economic and Monetary Affairs Commissioner Olli Rehn said. [
]A recent show of international support for the currency bloc, even if symbolic, is also helping to reduce worries, with both China and Japan providing help. [
] [ ]German Chancellor Angela Merkel said on Wednesday a European Union/International Monetary Fund bailout fund for heavily indebted euro zone countries was sufficient for now, but that Germany would be ready to do what was needed to support the euro -- comments some market players took as a softening of her opposition to the idea. [
]Immediate attention now turns to debt auctions in Spain and Italy, which will also be watched for signs of contagion.
Analysts expect the sales to go without a major hitch, but at elevated costs and there is little change in the view that Portugal will continue to struggle and will ultimately follow Greece and Ireland in seeking aid from the EU and IMF.
"It remains to be seen whether one strong auction will be enough to truly assuage fears over euro zone stability, but FX options data shows many traders may have begun to bet on, and hedge against, further euro strength," said David Rodriguez, a strategist at DailyFX.
"It will be important to watch for similarly robust results out of the Spanish and Italian debt auctions if the euro is to continue higher against the safe-haven U.S. dollar."
All these developments left the dollar looking lacklustre.
The dollar index, which tracks the greenback's performance against a basket of major currencies, inched up 0.2 percent on the day to 80.19 after having lost about 1 percent this week.
The dollar moved sideways against the yen at 83.08 yen <JPY=>, holding within the previous session's trading range.
The Aussie shed 0.2 percent to $0.9940 <AUD=D4> after a surprisingly small rise in employment data, though strong commodity prices and the currency's high interest rates limited its losses. (Additional reporting by Ian Chua in Sydney, Chikako Mogi in Tokyo and Reuters FX analysts Krishna Kumar in Sydney, and Rick Lloyd in Singapore; Editing by Michael Watson)