By Masayuki Kitano
TOKYO, Feb 26 (Reuters) - The yen edged up on Tuesday as Tokyo shares gave up early gains and fell, prompting some mild selling of higher-yielding currencies that dragged the Australian dollar down from three-month highs. The yen had fallen across the board on Monday after Standard & Poor's affirmed the top-notch credit rating of U.S. bond insurer MBIA Inc <MBI.N>, easing some concerns about ailing credit markets and giving a boost to riskier assets like stocks.
The possibility of an imminent rescue plan for bond insurer Ambac Financial Group Inc <ABK.N> also helped improve investor confidence.
But Japanese shares slipped, partly as investors booked profits on the rise in the Nikkei share average <
> to a six-week high. Other Asian equity markets were mixed on the day. [ ]The dip in stocks nudged the high-yielding New Zealand dollar down from to a 23-year high of $0.8153 <NZD=D4>. The Australian dollar pulled back after reaching three-month peaks against the dollar <AUD=D4> and the yen <AUDJPY=R>.
A greater willingness to hold risky positions often prompts investors to return to carry trades in which they borrow the low-yielding yen to fund investments in higher-yielding currencies and assets.
"No one thinks the monoline issue will resolve everything," said Akira Kato, senior manager for the Bank of Tokyo-Mitsubishi UFJ's foreign exchange trading department.
"When there is some positive news, you do see some moves back toward risk-taking positions and away from positions aimed at avoiding risk. But such moves are still pretty limited," he said.
The dollar dipped 0.1 percent on the day to 107.87 yen <JPY=>, having fallen back from the day's highs near 108.15 yen.
The euro was steady at $1.4810 <EUR=>, near a three-week high of $1.4863 hit on electronic trading platform EBS on Friday.
Against the yen, the euro dipped 0.3 percent to 159.78 <EURJPY=R>, pulling away from Monday's peak of 160.43 yen -- what was the highest since mid-January.
Concern that financial firms may suffer greater losses if the bond insurers lose their top-notch ratings, leading to ratings downgrades on the fixed-income securities they back, have kept investors on edge since the start of the year.
INTEREST RATE OUTLOOK
Traders awaited the German Ifo business sentiment survey for February due later in the session for fresh clues on the health of the euro zone economy and what it means for the interest rate outlook.
"There has been a focus recently on inflation," said Bank of Tokyo-Mitsubishi UFJ's Kato, noting that Germany's biggest labour union, IG Metall, won a 5.2 percent headline pay increase last week.
That pay increase was the highest in 15 years and equivalent to an annualised rise of more than 4 percent.
"If the Ifo survey shows a significant improvement from the previous month, the euro's upward trend could strengthen," Kato said.
Traders said the dollar continued to be held back by concerns of a possible U.S. recession and the prospects of further interest rate cuts by the Federal Reserve.
"Currencies with a clear direction in monetary policy are supported, such as the Australian dollar with expectations for rising interest rates, and a rate cut outlook is weighing on the U.S. dollar," said Shogo Nagaya, forex manager at Nomura Securities. "The euro is steady as views receded for a near-term rate cut.
"Flows linked to the difference in yields are back, in addition to the return of some risk appetite," he said.
U.S. January producer price inflation data will also be released on Tuesday, and Federal Reserve Vice Chairman Donald Kohn is due to speak on the domestic economy and monetary policy. (Additional reporting by Chikako Mogi; Editing by Eric Burroughs)