* World stocks down one percent on U.S. economic worries
* Euro falls to 5-wk low after dovish c.banker comments
* Dollar near 15-year low vs yen; bond yields fall more
By Jeremy Gaunt, European Investment Correspondent
LONDON, Aug 20 (Reuters) - Investors dumped risky assets on Friday and fled into bonds and safe-haven assets including the Japanese yen amid growing concerns about slackening economic growth.
European stocks fell one percent and U.S. stock futures pointed to a weak open in New York after a slew of poor jobs and sentiment numbers drove Wall Street to its lowest close in almost a month on Thursday.
The euro <EUR=> fell one percent after European Central Bank Governing Council member Axel Weber bolstered the view monetary policy would remain loose for months, adding to fears that more economic weakness lies ahead in the euro zone too.
The yen, a popular safe haven, approached a 15-year high against the dollar, the Swiss franc rose and the steep declines in U.S. bond yields gathered pace.
U.S. jobless claims on Thursday hit a nine-month high and a volatile U.S. regional manufacturing index showed the first contraction in a year. [
]These numbers have revived fears of a double-dip recession in the world's largest economy and boosted demand for bonds.
"The market is falling on concerns about GDP growth going forward," said Dean Tenerelli, fund manager at T Rowe Price.
"It's about the effect of a U.S. slowdown and uncertainty and how earnings will look in 2011, when austerity kicks in."
World stocks as measured by MSCI <.MIWD00000PUS> and Thomson Reuters <.TRXFLDGLPU> were down almost one percent to three-week lows. The pan-European FTSEurofirst 300 <
> fell 1 percent.Lower global oil prices have undermined key energy stocks. The STOXX Europe 600 Oil & Gas index <.SXEP> was off 0.2 percent as oil prices fell $1 a barrel <.CLc1>.
U.S. futures for the Dow Jones <DJc1>, S&P 500 <SPc1> and Nasdaq <NDc1> were down between 0.6 and 0.7 percent,
The weakness in Europe and the United States carries on from Asia where Japan's Nikkei average <
> fell 2 percent, hit by the U.S. economic worries, but also by jitters over what steps Japanese authorities might take to stem the recent yen rise.Markets are rife with speculation that the Bank of Japan may loosen its already-easy monetary policy at an emergency meeting next week. [
]
RISING YEN
The dollar has been buttressed by safe-haven demand after the U.S. data, helping it stay above a 15-year trough against the yen <JPY=>. It was unchanged at 85.39 yen, hovering above 84.72 yen hit last week for the first time since 1995.
The greenback hovered near seven-month lows against another safe haven asset, the Swiss franc <CHF=>.
But the euro fell after Bundesbank chief Axel Weber said it would be "wise" to extend unlimited liquidity to banks past the end of 2010 and resume discussions to exit loose monetary conditions next year. [
]The euro <EUR=> was 1 percent lower on the day at $1.2686 according to Reuters data, its lowest since mid-July.
"The comments will lead the market to believe that policymakers are expecting further economic weakness," said Raghav Subbarao, currency analyst at Barclays Capital.
"Although a move towards active easing requires more bad data, slowing growth will postpone any policy tightening."
Bonds were benefiting from the mounting risk aversion, with U.S. two-year yields collapsing to a record low of 0.459 percent <US2YT=RR> while 30-year yields <US30YT=RR> fell to 3.598 percent -- a low not seen since April 2009.
"It's more flight to quality," a bond trader in London said. "If you're short this market, you're in a world of pain. It's pretty much that simple."