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* Gold slides as funds sells gold and opt for cash
* Dollar rallies to 1-1/2 year high vs euro (Recasts, updates with quotes, closing prices, market activity, adds NEW YORK to dateline)
By Frank Tang and Jan Harvey
NEW YORK/LONDON, Oct 21 (Reuters) - Gold tumbled as much as 4 percent on Tuesday as a sharp dollar rally dented the precious metal's appeal as an alternative investment, triggering a bout of long liquidation by commodity funds.
"With the dollar getting so much stronger, it has made other investments such as fixed-income and government treasury products much more attractive," said Rob Kurzatkowski, futures analyst at optionsXpress.
"Right now a lot of the hedge funds, which have supported the bull market in commodities, are largely sitting in cash positions or testing the water and doing it in a small scale," Kurzatkowski said.
Spot gold <XAU=> traded at $772.40 an ounce at 3:05 p.m. EDT (1905 GMT), down 2.8 percent from Monday's close of $795. Earlier it touched a session low of $764.20, which marked the weakest level since Sept 15.
The gold contract for December delivery <GCZ8> settled down $22.00, or 2.8 percent, at $768.00 an ounce on the COMEX division of the New York Mercantile Exchange.
After several weeks of buffeting by equity markets, which have dictated interest in gold as a haven from risk, the precious metal is now returning to its usual two external influences, the dollar and crude oil, say analysts.
"The market is more focused on euro/dollar again," said Commerzbank senior trader Michael Kempinski. "The stock market has made back some of its losses so safe-haven buying is over for the time being."
The dollar raced to a 1-1/2-year peak versus a basket of currencies as investors bet that interest rates outside the United States could fall steeply to shore up global growth. [
]Fears over demand are weighing on all industrial commodities, with prices of oil and copper around 50 percent below their all-time highs. If commodity prices fall it is likely to dent demand for gold as an inflation hedge.
U.S. crude futures <CLc1> ended $3.36 lower at $70.89 a barrel on Tuesday, pressured by expectations a global recession will cut demand for oil. [
]Crude had benefited on Monday from expectations that oil cartel OPEC will cut production at its emergency meeting in Vienna on Friday.
Physical interest in gold remains supportive, however. The SPDR Gold Trust, the world's largest gold-backed exchange-traded fund, said its holdings remain near record levels, despite a small outflow on Monday. [
]Among other precious metals, platinum and palladium were little changed as traders took a breather after last week's heavy losses and Monday's recovery.
North American Palladium <PDL.TO> said on Tuesday it is temporarily closing its Lac des Iles mine due to falling metals prices. [
]Spot platinum <XPT=> was at $882.50, down 1.2 percent from Monday's late quote of $893.00, while palladium <XPD=> was at at $180.50, up 1.1 percent from Monday's close of $178.50.
Silver <XAG=> at $10.12, up 3.8 percent from Monday's finish of $9.75.