By Rafael Nam
HONG KONG, Feb 15 (Reuters) - Asian stocks fell on Friday after the Federal Reserve chairman said risks to U.S. economic growth had picked up, while global credit concerns resurfaced after a steep ratings downgrade of a U.S. bond insurer.
Shares in exporters and financials dropped, derailing a rally in Asian markets the previous day that saw Japanese stocks post their biggest daily gain in six years on optimism about the global economy.
The dollar stayed weak on the growing concerns about the outlook for the world's largest economy, a worry for exporters as stronger Asian currencies hit returns earned overseas.
Safe-haven assets such as bonds and gold edged higher, while platinum retreated from an historic high hit on Thursday. Oil prices fell after gaining more than 2 percent on Thursday.
"Although both the U.S. and Japan had surprisingly good indicators this week, if you look at the actual contents they weren't really that good," said Yutaka Miura, a senior technical analyst at Shinko Securities.
"Add in Bernanke, the ratings cut and UBS, and it's clear that the subprime worries are still there."
Fed Chairman Ben Bernanke acknowledged the outlook for the U.S. economy had worsened in recent months and said risks to growth had increased. [
]The financial sector was among the decliners after Moody's Investors Service on Thursday cut its top "AAA" rating on a unit of FGIC Corp by six notches, raising fears about sell-offs in the debt guaranteed by the U.S. bond insurer. [
]Bond insurers face billions of dollars in payouts after they guaranteed repackaged subprime mortgages and other risky debt.
Swiss bank UBS <UBSN.VX> shocked markets on Thursday with tens of billions of dollars of new exposure to risky U.S. mortgages, leveraged finance and complex securities. [
]The MSCI measure of stocks outside Asia <.MIAPJ0000PUS> fell 1.1 percent as of 0150 GMT, having already dropped 10 percent so far in a year characterised by a widening global credit crisis and a potential sharp slowdown in the United States, Asia's biggest export market.
The falls have been larger than the 6.7 percent drop seen in the Dow Jones industrial average <
> this year. The MSCI Asia index had risen by double digits in each of the previous five years."I think investors are tempted to buy after recent sharp drops in stock markets made valuations very attractive, but they are struggling to find the right time to return," said Kim Joong-hyun, an analyst at Goodmorning Shinhan Securities.
Japan's Nikkei benchmark index <
> fell 1.5 percent, Australian shares < > lost 1.4 percent, and stocks in South Korea < >, Taiwan < >, and Singapore <.FTSTI> were off less than 1 percent.Shares in Singapore's DBS <DBSM.SI> dropped more than 1 percent, but later recovered, after Southeast Asia's biggest bank posted an 18 percent fall in quarterly profit amid further writedowns linked to the global credit turmoil.
WEAKER DOLLAR
The dollar slipped to around 107.8 yen in early Tokyo trade, retreating from Thursday's one-month high, after Bernanke said the Fed would act as needed to help the struggling U.S. economy. His remarks were widely interpreted as leaving the door open to more U.S. interest rate cuts.
As risk aversion returned in Asia, spot gold prices <XAU=> firmed to above $909 an ounce, while Japanese government bond futures edged higher, with the March 10-year JGB futures <2JGBv1> up 0.17 point to 137.62.
Platinum <XPT=> slipped to $1,955/$2,002 as investors locked in profits after the metal soared above $2,000 an ounce on Thursday. U.S. crude oil <CLc1> eased around a third of a dollar to $95.15 a barrel.