* Sell-off sends gold to five-week low below $900
* Dollar strengthens after better-than-expected jobs data
* Banks cut platinum outlook on better supply, demand balance
(Recasts, adds comment, updates prices)
By Jan Harvey
LONDON, July 30 (Reuters) - Gold tumbled almost 3 percent to a five-week low below $900 an ounce on Wednesday as a stronger dollar, weaker oil and receding inflation fears prompted a sell-off.
Gold <XAU=> dipped to $894.30/895.30 an ounce at 1349 GMT from $918.80/920.30 an ounce late in New York on Tuesday. Earlier in the session it slipped as low as $893.50, its weakest level since June 26.
"(Gold) has suffered from some dollar-bullish news around," said Simon Weeks, director of precious metals at the Bank of Nova Scotia.
"The dollar has been quite resilient of late. We had some decent consumer confidence numbers yesterday from the States, the ADP employment numbers were better today, so ... there seems to be an air of dollar bullishness around."
The precious metal weakened in early trade, slipping below support around $913 an ounce after U.S. economist and trader Dennis Gartman said he was exiting his gold positions.
Further selling then took the metal to $903 an ounce, before a sharp strengthening in the dollar after above consensus ADP jobs data sent it lower. [
]Gold typically moves in the opposite direction to the greenback, as it is often bought as a hedge against currency weakness. A stronger greenback also makes gold more expensive for holders of other metals.
The U.S. Federal Reserve also said it is boosting liquidity in the financial markets. The Fed said it will extend two lending facilities through to January, and announced new coordinated action with the ECB. [
]Gold is also suffering from receding inflation fears, which were a key factor driving the yellow metal to new all-time highs earlier this year.
"The reality for the gold market is that inflation risks are leaving the price rapidly, courtesy of the weaker growth outlook and the fact that central banks are still trying to sound as hawkish as the underlying growth outlook allows them to be," said JPMorgan in a note.
Weaker oil prices are also pressuring gold. Traders will be closely watching the crude market later in the session, amid expectations prices could fall further after U.S. stockpile data is released at 1430 GMT.
PLATINUM LANGUISHES
Platinum prices languished on Wednesday as the market worried about the outlook for demand and fears over supply eased. Two banks, Goldman Sachs and Standard Chartered, cut their platinum price forecasts for 2008 and 2009.
Standard Chartered said it now sees the metal trading at an average $1,750 an ounce in the fourth quarter of this year and $1,675 in 2009, against previous forecasts of $2,050 and $2,105 respectively.
The bank said while it had expected to see fresh power outages from electricity company Eskom over the South African winter, these had not materialised.
Generating problems in the republic earlier this year helped push platinum prices to an all-time high.
Goldman meanwhile said it is cutting its full-year forecast to $1,907 an ounce from $2,107, and its 2009 forecast to $1,963 from $2,300, in response to signs of weaker demand.
In supply news, mining group Xstrata <XTA.L> said it achieved record platinum output in the first half of 2008.
Spot platinum <XPT=> was little changed at $1,715.00/1,727.00 an ounce from $1,735.50/1,755.50 late in New York -- far off a record high of $2,290 hit in March.
Among other precious metals, spot palladium <XPD=> fell to $369.00/373.00 from $380.00/388.00, having earlier touched a new 5-1/2 month low of $366.50 an ounce, tracking platinum.
Silver <XAG=> tumbled to $16.85/16.89 an ounce from $17.32/17.38.
(Reporting by Jan Harvey; Editing by Peter Blackburn)