* U.S. stocks surge, bargains snapped up in wild session
* Dollar gains as weak U.S. data sparks risk aversion
* Oil slips below $70 for first time since August 2007 (Adds volatility comment in paragraphs 12, 13, 14)
By Herbert Lash
NEW YORK, Oct 16 (Reuters) - U.S. stocks jumped in a late surge on Thursday, as investors snapped up battered stocks a day after Wall Street's worst session since the 1987 crash, while oil slid below $70 a barrel for the first time since August 2007.
Gold sank to one-month lows below $800 as funds dumped assets in favor of cash after a spate of dire U.S. economic data darkened the outlook for both corporate earnings and demand for raw materials.
A broad sell-off in commodities saw declines in copper, aluminum and grains, with silver and platinum group metals extending sharp losses to multiyear lows as investors sold on recession fears.
Major European stock indexes fell about 5.0 percent and U.S. stocks swung wildly, shedding more than 4.0 percent before midday after a Federal Reserve survey showed U.S. Mid-Atlantic factory activity crashed to an 18-year low in October.
Earlier, signs of a looming worldwide economic slowdown led Japan's Nikkei <
> to suffer its worst one-day losses since the crash of October 1987, slumping 11.4 percent.U.S. stocks surged in the last hour of trading, a volatile pattern seen in other recent sessions, as investors snapped up beaten-down shares a day before stock options expire.
"I think this is bargain hunting and there are some bargains out there. Some of these stocks are at historic lows," said Warren Simpson, managing director at Stephens Capital Management in Little Rock, Arkansas.
Almost all the stocks in the 30-share Dow rose after all the components were down earlier in the day.
The 6 percent decline in crude oil, which is now down more than 50 percent since a July peak of more than $147 a barrel, helped airline and retail stocks.
The S&P retail index <.RLX> jumped 4.3 percent. Wal-Mart Stores <WMT.N>, which is not part of the index, rose 9.1 percent.
The Dow Jones industrial average <
> closed up 401.35 points, or 4.68 percent, at 8,979.26. The Standard & Poor's 500 Index <.SPX> gained 38.59 points, or 4.25 percent, at 946.43. The Nasdaq Composite Index < > climbed 89.38 points, or 5.49 percent, at 1,717.71.The Dow has experienced daily declines or advances of 370 points or more in six of the past nine sessions. Forced selling is behind much of the volatility, with scant buyers on the other side of trades, said Andrew Milligan, head of global strategy at Standard Life Investments in Edinburgh.
"So you're getting these big down days and of course, sometimes big up days as well, as these different buyers and sellers oscillate in the marketplace," Milligan said.
Wall Street's choppy session was marked by Citigroup Inc <C.N> reporting its fourth straight quarterly loss, reflecting more than $13 billion of loan losses and write-downs for complex and risky debt. Citigroup shares fell 2 percent.
European stocks ended steeply lower, with oil and financial companies leading the decline on fears of a global recession.
The FTSEurofirst 300 <
> index of top European shares unofficially ended down 5 percent at 858.41. The top drag on the European index was Total <TOTF.PA>, followed by HSBC <HSBA.L>. Total fell 9.2 percent and HSBC 4 percent.U.S. Treasury bills and long bonds ended weaker in erratic trading amid concerns about increased borrowing and debt supply from the government to finance its massive financial bailout.
Two-year notes <US2YT=RR> fell 4/32 in price to yield 1.63 percent, while benchmark 10-year Treasury notes <US10YT=RR> fell 4/32 in price to yield 3.97 percent. Bond prices and yields move inversely.
The dollar rose against the yen and euro in choppy trade as investors sought shelter in dollar-denominated assets.
The dollar rose against a basket of major currencies, with the U.S. Dollar Index <.DXY> up 0.08 percent at 82.333. The euro <EUR=> fell 0.10 percent at $1.3447. Against the yen, the dollar <JPY=> gained 2.01 percent at 101.59.
Oil touched a 15-month low on rising U.S. inventories and concerns a possible recession would slow demand further.
U.S. crude <CLc1> settled at $69.85 a barrel, down $4.69, after sliding as low as $68.57, the lowest since June 27, 2007.
In London, front month November Brent crude <LCOX8>, which expires on Thursday, settled at $66.32 a barrel, down $4.48.
"It's still a demand story," said Amanda Kurzendoerfer, commodities analyst at Summit Energy in Louisville, Kentucky.
"We saw some very large builds in gasoline and crude oil for the second week in a row, this confirms the fact that demand is truly weakening in the United States," she said.
Fear of slowing global demand slammed commodity prices, driving copper prices down almost 8 percent to a 33-month low, while spot gold prices tumbled more than 5 percent.
Alan Ruskin, chief international strategist at RBS Global Banking in Greenwich, Connecticut, said the Philly Fed data confirmed that the meltdown in financial markets is being closely followed by a dramatic slide in the economy.
"We have seen weaker Philly Fed data but only fleetingly at the depths of recessions. Ugly data, more risk aversion," Ruskin said.
Spot gold fell to a session low of $786.80 an ounce, before bouncing back to $801.10 an ounce at midafternoon, down 5.6 percent from Wednesday's nominal close of $848.00.
The economic data overshadowed a decline in most of the short-term lending rates overnight, indicating that efforts by central banks to loosen up credit may be working in the key short-term market. (Reporting by Ellis Mnyandu, Ellen Freilich and Steven C. Johnson in New York and Joe Brock, Peter Blackburn and Jan Harvey in London; Writing by Herbert Lash; Editing by James Dalgleish)