* US stocks fall on worry over impact of budget proposal
* Record $1.75 trillion US budget deficit drags on bonds
* Oil jumps 5 pct on signs of rising US demand, OPEC moves
* Dollar falls vs euro but safe-haven appeal lingers (Updates with close of U.S. markets)
By Herbert Lash
NEW YORK, Feb 26 (Reuters) - The cost of extra borrowing to pay for a record $1.75 trillion U.S. budget deficit pushed U.S. stocks and government debt prices down on Thursday, as oil rallied for a third straight day on signs of rising demand.
U.S. gold futures ended lower for a fourth consecutive session after U.S. President Barack Obama's budget offered the promise of a better economy, denting bullion's appeal as a safe haven.
The dollar fell against the euro, as investors expressed a willingness to take on more risk, although a report showing a plunge in new U.S. home sales in January added fresh evidence of a sagging economy, which helped limit losses.
World stocks had rallied as governments made fresh moves to support weak economies and banking systems, but Obama's plans to expand healthcare coverage and curb costs by cutting Medicare payments to private insurers pushed U.S. stocks down.
"They are certainly looking at providing healthcare across the board for everyone," said Peter Jankovskis, director of research at OakBrook Investments LLC in Lisle, Illinois.
"But to pay for that they are looking to obviously reduce revenue for some of the healthcare agencies," he said.
Merck <MRK.N> and Johnson & Johnson <JNJ.N> were the No. 1 and No. 3 drags on the Dow with the budget proposal taking direct aim at drugmakers and health insurers to help fund an overhaul of the U.S. healthcare system.
The American Exchange Pharmaceutical Index <.DRG> fell 4.1 percent, while health insurers plunged. Humana Inc <HUM.N> fell almost 20 percent, while Aetna Inc <AET.N> and UnitedHealth Group Inc <UNH.N> fell by double digits. The S&P healthcare index <.GSPA> fell 5.1 percent.
The Dow Jones industrial average <
> closed down 88.81 points, or 1.22 percent, at 7,182.08. The Standard & Poor's 500 Index <.SPX> fell 12.07 points, or 1.58 percent, to 752.83. The Nasdaq Composite Index < > shed 33.96 points, or 2.38 percent, to end at 1,391.47.U.S. government debt prices fell as the prospect of a record deficit -- the largest since World War Two as a percentage of U.S. gross domestic product at 12.3 percent -- highlighted the pressing need to substantially ramp up bond issuance.
The deteriorating budget outlook dragged benchmark 10-year U.S. Treasury notes <US10YT=RR> down 17/32 in price to yield 2.99 percent. The 30-year U.S. Treasury bond <US30YT=RR> fell 47/32 in price to yield 3.67 percent. Bond yields move inverselty to their prices.
"The Obama budget, which is a more honest appraisal of the fiscal condition of the U.S. Treasury, reinforces that there will be a boatload of new bond supply to contend with in the years to come," said William Sullivan, chief economist of JVB Financial Group in Boca Raton, Florida.
Although the housing data pointed to a poor U.S. economy, investors believe that, with an administration taking the initiative, the United States is more likely to recover faster than other parts of the world, helping to bolster the dollar.
Against the yen, the dollar <JPY=> was up 0.74 percent at 98.39, while it barely fell against a basket of major currencies. The U.S. Dollar Index <.DXY> was down 0.01 percent at 87.832.
The euro <EUR=> was up 0.20 percent at $1.2732.
"Even with bad data, the U.S. dollar is still a safe-haven play. If the U.S. were alone in the crisis, the euro would be trading two-to-one to the dollar," said Dan Cook, senior market analyst at IG Markets in Chicago. "But this is a global crisis."
OIL JUMPS, GOLD SLIPS
U.S. oil prices jumped more than 6 percent to more than $45 a barrel on expectations the Organization of Petroleum Exporting Countries will cut output again, and on signs of a rebound in gasoline demand in the United States, the world's top consumer.
The United Arab Emirates, an OPEC member, announced it was cutting back supplies to Asia for April, adding to expectations the producer group will throttle back production further when it meets in March. [
]U.S. crude for April delivery <CLc1> gained $2.72 to settle at $45.22 a barrel. London Brent crude <LCOc1> settled up $2.22 at $46.51 a barrel.
Gold for April delivery <GCJ9> settled down $23.60, or 2.4 percent, at $942.60 an ounce in New York.
European shares closed higher on Thursday, ending a four-day losing streak, as Royal Bank of Scotland <RBS.L> led a banking sector encouraged by a new UK scheme to insure nonperforming bank assets.
The FTSEurofirst 300 <
> index of top European shares closed 2.28 percent higher at 732.47 points after hitting a six-year low on Wednesday.The MSCI <.MIWD00000PUS> world stocks index was little changed at 190.30, after being up for most of the day. (Reporting by Leah Schurr, Vivianne Rodrigues and Pedro Nicolaci da Costa in New York, Ian Chua and Kirsten Donovan in London and Blaise Robinson in Paris; writing by Herbert Lash; Editing by Jonathan Oatis)