* U.S. Fed says to buy long-term U.S. Treasuries
* U.S dollar falls most since 1985
* U.S. crude oil stocks up 2 mln bbls -EIA
By Fayen Wong
PERTH, March 19 (Reuters) - Oil reversed losses and rose more than 2 percent to above $49 a barrel on Thursday, after a surprise move by the Federal Reserve to buy government bonds revived hopes the battered U.S. economy could soon begin its recovery.
Analysts said oil's rebound was also bolstered by a sharp drop in the U.S. dollar, which posted its largest percentage drop since 1985, as the Fed's move, aimed at resuscitating lending, prompted a sharp fall in market interest rates. [
]U.S. light crude for April delivery <CLc1> recouped previous sessions' losses and rose $1.30 to $49.34 a barrel by 0053 GMT, after having touched $49.83 earlier.
London Brent crude <LCOc1> rose $1.26 to $48.92.
"It's a combination of a drop in the U.S. dollar and the Fed's move that has pushed up oil prices," said David Moore, a commodity strategist at the Commonwealth Bank of Australia.
"But I suspect more of it is probably on hopes that U.S. policy stimulus would help turn the economy around, or at least stabilise it."
The U.S. Federal Reserve on Wednesday stunned markets by announcing it would pump another $1 trillion into the ailing U.S. economy by buying long term government debt for the first time since the 1960s and by expanding its purchases of mortgage bonds. [
]The move triggered a rally on Wall Street on Wednesday, while Japan's Nikkei average also rose 0.7 percent in early trading.
Still, analysts cautioned that a continued weakness in demand could limit oil's gains in the near term.
Earlier on Wednesday, oil fell after data showed U.S. crude inventories swelled to the highest level in nearly two years and the World Bank cut its 2009 forecast for China's economic growth.
In its weekly report, the U.S. Energy Information Administration (EIA) said crude oil stocks rose 2.0 million barrels to 353.3 million last week -- double the increase forecast by analysts -- while gasoline supplies jumped by 3.2 million barrels, countering forecasts of a 1.2-million-barrel drop. [
]Oil's losses on Wednesday were further exacerbated after World Bank cut its 2009 economic growth forecast in No. 2 consumer China and said Beijing would undermine its own medium-term goals if it tried to offset the slowdown by further boosting investment. [
]Slumping demand and rising inventories have helped drag oil off record highs over $147 a barrel struck in July as the economic meltdown hit consumption across the globe.
But oil prices, which sank to levels below $35 last month, have since stabilised in the $40-$50 region, as producer group OPEC cuts output by 4.2 million barrels per day and vowed on Sunday to achieve stricter enforcement of existing curbs.
"While some see the possibility of breaking out of this range to the upside, we maintain that despite OPEC supply cuts in the making, demand considerations will continue to shape the path of oil prices this quarter and next," Harry Tchilinguirian, a senior oil analyst at BNP Paribas, said in a research note. (Reporting by Fayen Wong; Editing by Clarence Fernandez)