* Global stocks gain on Portuguese bond sale, sentiment
* Euro rises vs dollar after good demand for Portugal debt
* Brent oil hits 27-month high above $98 on demand outlook
* Strong Portuguese auction dampens demand for Treasuries (Updates with close of European markets)
By Herbert Lash
NEW YORK, Jan 12 (Reuters) - Global stocks and the euro rallied on Wednesday after healthy demand for Portugal's debt sale eased concern over the latest spasm of Europe's lingering debt crisis and boosted sentiment among investors.
European stocks hit a 28-month closing high, lifted by speculation the European Union will bolster the region's rescue fund, and government bond prices dropped after the Portuguese bond auction reduced the safe-haven appeal of debt and gold.
The average yield on Portugal's 10-year bond fell compared to a previous sale in November, confounding expectations that yields would top 7 percent for the first time in the history of the euro zone.
The euro extended gains versus the U.S. dollar, with traders citing options-related demand pulling it toward a session high of $1.3113. For details see [
]That gain put the euro above its 200-day moving average, which Reuters data put at $1.3070, a level that would be a first step toward improved euro sentiment, traders said.
World stocks as measured by MSCI's all-country world index <.MIWD00000PUS> advanced 1.4 percent, while it's emerging markets index <.MSCIEF> gained 1.7 percent.
In Europe, the FTSEurofirst 300 <
> index of top European shares finished 1.5 percent higher at 1,163.94 points, the highest close since September 2008, with Spanish banks leading a relief rally."Encouraging news that the EU Commission could use the region's rescue fund to back sovereign debt issues is helping bring down risk premiums and this is directly benefiting the banks," said Oscar Moreno, fund manager at Renta4 in Madrid.
U.S. stocks also gained, helped by signs of strength in the U.S. banking sector, but Europe played a key role.
The European debt crisis and future strength in U.S. banks "are probably the two big stories" for equities, said Eric Kuby, chief investment officer at North Star Investment Management Corp in Chicago.
Wells Fargo raised the U.S. bank sector to an "overweight" rating and JPMorgan Chase & Co <JPM.N> Chief Executive Jamie Dimon said his bank could pay an annual dividend of 75 cents to $1 once the Federal Reserve completes and approves stress tests of the largest U.S. banks. [
].On Wall Street, the Dow Jones industrial average <
> was up 107.85 points, or 0.92 percent, at 11,779.73. The Standard & Poor's 500 Index <.SPX> was up 12.14 points, or 0.95 percent, at 1,286.62. The Nasdaq Composite Index < > was up 18.00 points, or 0.66 percent, at 2,734.83.After Lisbon's successful debt sale, attention now turns to Spain and Italy, which will sell debt on Thursday in closely watched auctions. Analysts expect the sales to pass without a major hitch, albeit at higher costs.
"A couple of positive bond auctions might limit euro losses, but I don't think they are going to alleviate any of the long-term concerns," said Omer Esiner, chief market analyst at Commonwealth Foreign Exchange in Washington.
"There's still a huge amount of debt that needs to be rolled over and that's going to continue to keep investors wary," he added.
The euro <EUR=> was last traded up 1.0 percent at $1.3099.
Oil prices rose after the Portuguese bond sale soothed concern over the euro zone's finances.
Spot gold prices <XAU=> rose to $1,381.67.
Brent crude oil rose above $98 a barrel for the first time in 27 months, before paring some gains, as production shutdowns and growing global demand raised expectations of tighter supplies. [
]A gas leak forced two Norwegian oilfields to shut down briefly and a leak shut the Trans Alaska Pipeline, which ships about 12 percent of U.S. crude output, on Saturday although it has been allowed to resume "limited operations."
Brent <LCOc1>, the benchmark for oil trade in Europe, the Middle East and Africa, rose as much as 85 cents to $98.46, the highest in 27 months, and was up $1.07 cents at $98.68.
U.S. light sweet crude oil <CLc1> rose 86 cents to $91.97 a barrel.
The benchmark 10-year U.S. Treasury note <US10YT=RR> was down 17/32 in price to yield 3.40 percent.
German bonds fell to their lowest since late December. The March Bund future <FGBLc1> dropped 122 ticks in price on the day, before recovering slightly to settle 110 ticks lower at 124.69.
The dollar was down against a basket of major currencies, with the U.S. Dollar Index <.DXY> down 0.86 percent at 80.151.
Asian shares were flat to slightly higher on the back of gains on Wall Street and solid U.S. earnings reports. Tokyo's benchmark Nikkei index <
> edged up 0.02 percent. The MSCI index of Asia Pacific stocks ex-Japan <.MIAPJ0000PUS> rose 1.1 percent. (Reporting by Chuck Mikolajczak, Karen Brettell, Wanfeng Zhou and Stephen S. Johnson in New York; Atul Prakash, Alex Lawler and William James in London; Writing by Herbert Lash, Editing by Kenneth Barry)