Tokyo - Asian shares rose on Wednesday buoyed by strength in global equities markets, firmer economic sentiment in Germany and hopes of a deal from US budget talks, while the dollar came under pressure ahead of the Federal Reserve's policy decision.
MSCI's broadest index of Asia-Pacific shares outside Japan gained 0.5% to a 16-month peak. The index has hit successive 16-month highs since December 5.
Australian shares were up 0.4 after touching a nearly 17-month high on the back of Wall Street gains and higher iron ore prices.
"Definitely the momentum is to the upside," said Stan Shamu, a market analyst at IG Markets. "Everyone seems to be pricing in a fairly positive outcome to the fiscal cliff negotiations as well."
South Korean shares inched up 0.2%, shrugging off news of North Korea's rocket launch, but profit-taking on large caps limited gains.
"North Korea is no longer an economic match for the South, so, short of a full-scale conflict, the North's actions will have little impact on the KOSPI," Im No-jung, chief economist at IM Investment & Securities, said of the Seoul stock market.
North Korea launched the second rocket this year on Wednesday just before 10 a.m. and may have finally succeeded in putting a satellite into space, the stated aim of what critics say is a disguised ballistic missile test.
Japan's Nikkei share average rose 0.5% after hitting a 7-1/2-month high earlier, led by gains in tech shares and other exporters on the weak yen.
The dollar remained broadly under pressure on expectations the Fed will take further monetary easing step, pushing the currency down to a three-month low against the Australian dollar. The euro popped back above $1.3000, pulling away from a two-week low of $1.2876 plumbed Friday.
The Fed is expected to announce it will buy $45bn per month of longer-dated Treasuries beginning in January on top of the $40bn in mortgage-backed security purchases it announced in September. The new buying will replace the Fed's current programme, Operation Twist, which expires at the end of December.
"Although the view that the Fed will shift to outright Treasury purchases is now very widely shared by market participants, we do not believe it has been fully reflected into markets or in positioning," said Vassili Serebriakov, a strategist at BNP Paribas.
"Accordingly, dollar weakness is highly likely should the Fed shift to outright US Treasury purchases."
Against the yen, the dollar steadied at ¥82.54. The Japanese currency has also been pressured by expectations for more easing from the Bank of Japan, which meets next week.
Data on Wednesday showed Japan's core machinery orders rose 2.6% in October from the previous month, up for the first time in three months but below a 3% rise forecast, highlighting how uncertainty over the global outlook continued to weigh on business investment and the broader economy.
Investors also closely followed developments in US budget talks to avert the "fiscal cliff," some $600bn of tax hikes and spending cuts scheduled to start in January, which economists have warned could send the US economy into recession and drag down the fragile global economy.
Negotiations to avert the "fiscal cliff" ahead of a year-end deadline intensified as President Barack Obama and US House of Representatives Speaker John Boehner spoke by phone on Tuesday after exchanging new proposals, in a possible sign of progress ahead of the end-of-year deadline
A group of high-profile chief executives urged President Barack Obama and Republican congressional leaders on Tuesday to strike a deal, reflecting mounting urgency to resolve the issue with time running out.
US crude futures inched up 0.2% to $85.96 a barrel and Brent rose 0.3% to $108.37.