* Dollar plunges to 13-1/2 year trough vs yen, below 88
* European, U.S. government debt touch fresh historic lows
* Oil slips; OPEC's record cut doesn't offset demand slide
* Stocks fall as economic worries overshadow retail gains (Adds close of U.S. markets)
By Herbert Lash
NEW YORK, Dec 17 (Reuters) - The dollar fell to a 13-year low against the yen while yields on U.S. long bonds slipped to fresh historic lows on Wednesday, a day after the Federal Reserve took bold measures to arrest a worsening recession.
Oil prices dropped to their lowest in more than four years after dealers said a record supply cut by the Organization of Petroleum Exporting Countries may fail to fully offset slumping energy demand brought on by the global economic downturn.
U.S. stocks fell as pessimism about the economy overshadowed a gain in retailers' shares on hopes that lower oil prices and interest rates will boost consumer spending.
Investors fearful of deflation and further losses in riskier assets from a worsening economy piled into longer-term government debt, sending their yields -- which move in the opposite direction to price -- to lows last seen in the 1950s.
"If we are going into a deflationary environment, you want the longest maturing instrument with the lowest default risk," said Tom Girard, co-portfolio manager at MainStay Income Manager Fund in New York.
Thirty-year U.S. government bonds <US30YT=RR> led the rally, with the yield, which moves inversely to price, hitting an intraday record low near 2.58 percent.
Yields on the benchmark 10-year U.S. Treasury note <US10YT=RR> briefly dropped below 2.08 percent, the lowest level since 1950, according to Global Financial Data.
Two-year German government bond yields hit their lowest level since the euro zone was created, with the two-year Schatz hitting 1.842 percent <EU2YT=RR>, according to Reuters data.
It was the lowest level since the rate-sensitive Schatz was launched in 1991.
Equity markets on either side of the Atlantic slid as the initial enthusiasm over the Fed's surprisingly aggressive interest rate cut on Tuesday gave way to weak financial results at key banks and European data reinforced a dismal outlook.
The Fed's surprisedly large cut further eroded the U.S. currency's appeal against the euro, which has gained a staggering 11 percent so far during the month.
The dollar hit a fresh 2-1/2 month low versus the euro and its plunge against the yen stoked speculation that Japanese authorities may intervene to rein in the yen's climb, which is hurting the nation's exporters.
"The underlying story in the FX market remains yield. The fact that the Fed made this major policy move yesterday really changed the balance of power towards the euro for the time being," said Boris Schlossberg, director of currency research at GFT Forex in New York.
The dollar fell against a basket of major currencies, with the U.S. Dollar Index <.DXY> down almost 2 percent at 78.606. Against the yen, the dollar <JPY=> fell 1.70 percent to 87.42.
The euro <EUR=> rose 2.17 percent to $1.4404.
U.S. stocks fell as pessimism about the economy overshadowed gains by retailers that recovered on hopes falling oil prices and interest rates will boost spending.
Energy companies also slipped as crude oil fell briefly below $40 a barrel for the first time since July 2004. Shares of Exxon Mobil <XOM.N> fell 2.5 percent while Chevron Corp <CVX.N> edged down 2.8 percent.
Financial stocks recouped earlier losses and added to sharp gains a day earlier after an analyst said poor results from Morgan Stanley <MS.N> will likely not be repeated. The bank's shares rose 2.3 percent.
The Dow Jones industrial average <
> closed down 99.80 points, or 1.12 percent, at 8,824.34. The Standard & Poor's 500 Index <.SPX> fell 8.76 points, or 0.96 percent, at 904.42. The Nasdaq Composite Index < > shed 10.58 points, or 0.67 percent, at 1,579.31.In Europe, BNP Paribas <BNPP.PA> revealed an 11-month loss at its investment banking unit, hit by exposure to an alleged fraud by U.S. financier Bernard Madoff.
The FTSEurofirst 300 <
> index of top European shares closed down 0.76 percent at 828.53 points.Oil fell. U.S. crude oil prices <CLc1> fell $3.54 to settle at $40.06 a barrel after dipping below $40 for first time since July 2004. London Brent <LCOc1> fell $1.12 to$45.53.
OPEC, eager to push prices back up, announced an agreement to cut 2.2 million barrels per day of output starting Jan. 1, the biggest single reduction on record.
The cut was slightly bigger than expected and will add to previous cuts of a daily 2 million barrels since September.
U.S. gold futures ended 3 percent higher after the Fed's action underscored mounting economic problems, bolstering bullion's appeal as an alternative investment.
The February gold contract <GCG9> settled up $25.80 to $868.50 an ounce in New York.
Asian stocks rose overnight, supported by sectors sensitive to interest rates in anticipation regional policy-makers will take more aggressive steps to support growth after the Federal Reserve's easing on Tuesday.
The MSCI index of Asian-Pacific stocks outside Japan <.MIAPJ0000PUS> rose 2.5 percent. But Japan's Nikkei share average <
> shed early gains to end down 0.5 percent as the yen's strength walloped exporters. (Reporting by Leah Schnurr, Richard Valdmanis, Richard Leong, Wanfeng Zhou in New York; George Matlock in London and Christoph Steitz in Frankfurt; writing by Herbert Lash; Editing by Chizu Nomiyama)