Asian shares enjoyed their best day in 15 months on Friday, after Wall Street boasted its biggest two-day advance since late 2011 amid relief the Federal Reserve was in no rush to withdraw stimulus from the U.S. economy.

The gains came even as oil stayed under pressure, suggesting equity investors were beginning to see the positives in lower fuel costs and increased consumer spending power.

Japan's Nikkei JNIc1 climbed 2.0 percent to erase most of it's recent losses, while Australia's main index romped ahead by 2.1 percent .AXJO.

MSCI's broadest index of Asia-Pacific shares outside Japan .MIAPJ0000PUS put on 1.5 percent, the steepest daily rise since September last year. Shares in Shanghai hit their highest in four years .SSEC before running into profit taking.

"Risk sentiment is ending the week on a stronger footing after a poor start," said analysts at Barclays. "Market expectations for ECB QE add to the Fed's upbeat message on U.S. growth and stabilization in Russia."

Extending Asia's bound, spreadbetter expect European markets to open between 0.6 percent and 0.7 percent.

Earlier, the Bank of Japan ended its last policy meeting of the year by recommitting to a massive stimulus campaign, printing yen to buy significant amounts of government bonds. It also offered a brighter view of the economy in a sign of confidence Japan can weather global market turbulence and the financial crisis in Russia.

BOJ Governor Haruhiko Kuroda will likely repeat calls for firms to increase wages at his post-meeting news conference, as well as urge Prime Minister Shinzo Abe to press ahead with fiscal and structural reforms.

On Wall Street, investors were still celebrating the Fed's pledge to be patient in raising rates. The Dow .DJI surged 2.43 percent, while the S&P 500 .SPX gained 2.4 percent and the Nasdaq .IXIC 2.24 percent.

That was the biggest daily rise for the S&P since January 2013 and left it up 4.5 percent in just two sessions.

GOING NEGATIVE

In currencies, the main mover was the Swiss franc which slid after Switzerland's central bank surprised by imposing negative interest rates on deposits, essentially charging banks for parking their francs at the SNB.

A higher franc would aggravate the country's deflation problem, so the SNB hopes to stem a flight to the safe-haven currency driven by concern over the euro zone and Russia's deepening crisis.

The franc duly slid to its lowest against the US dollar since May 2013 at 0.9847 francs CHF=. However, losses against the euro were much more modest in part because the European Central Bank is widely expected to ease again soon.

Indeed, analysts were quick to note that the SNB's negative rates take effect on Jan 22, the date of the ECB's next meeting, which only fueled speculation the ECB will finally launch all-out quantitative stimulus by buying government debt.

That was one reason the euro resumed its decline against the U.S. dollar, dropping to $1.2276 EUR= and a long way from the week's peak of $1.2569. That was uncomfortably close to its December trough of $1.2245, and a break there would take it to territory not visited since late 2012.

The dollar also regained ground on the yen to 119.24 JPY=.

With the ECB set to ease and the Fed contemplating tightening, yields have moved decisively in favor of the dollar. The premium that two-year Treasuries pay over bunds has fattened to 71 basis points, the widest since early 2007.

Yields on U.S. 10-year paper US10YT=RR rose back to 2.23 percent, having been as low as 2.00 percent early in the week.

In commodities, oil prices managed to steady for the moment after a wild week. Brent LCOc1 inched up 11 cents to $59.38 having lost over a $1.00 on Thursday, while U.S. crude CLc1 added 21 cents to $54.32.