* Bin Laden death gives initial perception of reduced risk
* Stocks, dollar rise; oil falls
* Wall Street set for gains
By Jeremy Gaunt, European Investment Correspondent
LONDON, May 2 (Reuters) - The killing of Al Qaeda leader Osama bin Laden by U.S. forces prompted investors on Monday to strip some of the risk premium underpinning world asset prices, lifting the dollar, boosting stocks and weakening commodities.
Oil, gold and silver prices all fell as reaction to the death of the West's most wanted man swept across thinly traded financial markets.
But investors warned that this kind of reaction to major news is often only temporary.
"Markets across the globe received a bit of a boost ... as news broke that U.S. forces had killed Osama bin Laden. However, like many euphoric bounces, they are often short-lived, especially given the possibility for reprisal attacks from extremists," said Ben Potter, market strategist at IG Index.
There were holidays in many countries -- including China, Hong Kong, Singapore, Thailand and Britain -- so trading was limited.
Nonetheless, the initial reaction was a boost for U.S. assets and a modest fillip for equities.
The dollar rebounded from a three-year low against a basket of currencies <.DXY>, where it had languished as a result of perceptions that the U.S. Federal Reserve is in no hurry to tighten monetary policy.
The dollar was up a quarter of a percent, off its daily highs. The announcement of bin Laden's death triggered short-covering demand for the dollar after the dollar index <.DXY> had hit its weakest since mid-2008.
Longer term, however, analysts said the news would have only a limited impact on the dollar because interest rates, not geopolitical events, are the overriding driver.
"Risk as a driver of the FX market has been much less than it has been ... The main trend is relative dollar weakness due to monetary policy," said Kasper Kirkegaard, currency strategist at Danske Bank in Copenhagen.
Dollar-sensitive oil and gold fell, dipping by as much as two percent at some point. U.S. crude <CLc1> was down close to 1.6 percent, earlier hitting a session low of $112.01, retreating from a 31-month peak of $114.18 set on Friday.
Silver tumbled 10 percent, its steepest fall since late 2008, hit by the dollar, increased margins for futures trading and a technical overhang after a 170 percent rally over the last 12 months to a record high last week.
STOCKS GAIN
European shares <
>, minus Britain's usual contribution, rose a quarter of a percent, lifting MSCI's all-country world stock index by 0.2 percent.U.S. stock index futures <SPc1> added to gains, Japan's Nikkei average <
> rose 1.4 percent on the day, while U.S. Treasury prices fell.U.S. Treasury yields pushed higher across the curve with the 10-year <US10YT=RR> rising to 3.308 percent from a six-week trough of 3.273 percent.
"By lowering national security risks overall, this is likely to bolster equity markets and lower U.S. Treasury prices in a reverse flight to quality movement," said Mohamed El-Erian, Chief Executive Officer and Co-Chief Investment Officer at PIMCO, which oversees $1.2 trillion in assets.
"Oil markets are likely to be the most volatile given their higher sensitivity to the tug of war between lower risk overall and the possibility of isolated disturbances in some parts of the Middle East and central Asia," he said. (Additional reporting by Ian Chua, Harpreet Bhal and Naomi Tajitsu; Editing by Ruth Pitchford)