* U.S. stocks slip, investors fret about Fed bond program
* Dollar slips further after biggest 1-day drop since 1985
* Bonds prices also slide after biggest rise since 1987
* Oil shoots above $51 barrel as dollar spurs commodities (Adds close of U.S. markets)
By Herbert Lash
NEW YORK, March 19 (Reuters) - Oil jumped more than 7.0 percent on Thursday and the U.S. dollar slid further on fears that the Federal Reserve's plan to pump an additional $1 trillion into the U.S. economy will ramp up inflation in the future.
U.S. stocks slipped as investors took profits in financials that soared after the Fed announced on Wednesday its latest move to end the deepest U.S. recession since the early 1980s.
The dollar fell for a second straight session and the euro soared above $1.37 as investors feared the massive purchase of U.S. Treasury debt will debase the world's reserve currency.
"We are facing what I think is one of the most aggressive inflationary periods in our country's history," said Zachary Oxman, senior trader with TrendMax Futures in Encinitas, California.
"The minute these (commodity) markets sniff inflation, things are going to go through the roof and the dollar is going to get whacked," he said.
Copper soared to a 4-1/2-month high as the dollar's slide and heightened expectations of inflation because of the Fed plan drove bullish sentiment in commodity markets.
Gold futures jumped almost 8.0 percent to their highest level in nearly three weeks as the Fed's move highlighted gold's value as an inflation hedge.
"It also points out that, if the Fed took such dramatic moves, there are still some serious problems out there, and it certainly renewed the flight to safety buying," said Bill O'Neill, managing partner of LOGIC Advisors in New York.
Copper hit a session peak of $4,020 a tonne in London markets, its highest level since early November, and crude oil soared above $51 a barrel, a level last seen in late November.
Grain prices also surged in Chicago markets, with wheat rising almost 5 percent, rice climbing nearly 4 percent and soy up about 3 percent, according to May contracts.
"I don't think the action is over yet in the dollar, but any further declines will definitely add support to our agriculture markets," said Terry Reilly, a grains analyst with Citigroup in Chicago.
U.S. crude <CLc1> settled up $3.47 at $51.61 a barrel, the highest settlement since Nov. 28. London Brent <LCOc1> rose $3.01 settle at $50.67 a barrel.
The euro <EUR=> rose 1.07 percent at $1.365, while against the yen, the dollar <JPY=> fell 1.28 percent at 94.62.
The dollar fell against a basket of major currencies, with the U.S. Dollar Index <.DXY> down 1.19 percent at 83.19.
Ngozi Okonjo-Iweala, a World Bank managing director, said markets were getting ahead of themselves but the Fed's surprise move was warranted because of the financial crisis.
"I'm not saying there should be no concern. You need to keep a bit of an eye on that. But I don't think we're there yet," Okonjo-Iweala told the Reuters Food and Agriculture Summit in Washington. "Inflation worries are a little bit down the road."
On Wall Street, financial shares led the benchmark S&P lower after the sharp run-up the day before. JPMorgan <JPM.N> fell 8 percent and the KBW Bank index <.BKX>, up 11 percent on Wednesday, slid 9.1 percent.
The weaker dollar helped boost shares in the energy and materials sectors, cushioning the market's slide. Alcoa Inc <AA.N> soared almost 17 percent, Caterpillar Inc <CAT.N> rose 3.4 percent and Chevron <CVX.N> added 0.8 percent.
The Dow Jones industrial average <
> closed down 85.78 points, or 1.15 percent, at 7,400.80. The Standard & Poor's 500 Index <.SPX> fell 10.31 points, or 1.30 percent, at 784.04. The Nasdaq Composite Index < > shed 7.74 points, or 0.52 percent, at 1,483.48.Profit-taking trimmed prices of U.S. Treasuries after the Fed's move sent yields down almost half a percentage point on Wednesday in the biggest single-day drop since the October 1987 crash on Wall Street.
The benchmark 10-year U.S. Treasury note <US10YT=RR> fell 15/32 in price to yield 2.60 percent. The 2-year U.S. Treasury note <US2YT=RR> fell 3/32 in price to yield 0.87 percent.
U.S. gold futures for April delivery <GCJ9> settled up $69.70 at $958.80 an ounce in New York.
European shares closed higher, with banks and commodities taking the lead, but gains were capped as investors fretted about the implications of the Fed plan.
The pan-European FTSEurofirst 300 <
> index of top shares closed up 0.6 percent at 715.17 points. (Reporting by Leah Schnurr, Matthew Robinson, Steven C. Johnson, Chris Reese in New York and Sam Nelson in Chicago; writing by Herbert Lash; Editing by Leslie Adler)