* Gold up over 5 pct for Q3 on weak dlr, easing worries
* Gold-to-silver ratio hits 11-month low
* IMF sold 18.5 tonnes gold in Aug. vs 16.9 tonnes in July
* Coming up: U.S. August personal income due Friday
(Recasts, adds comments, updates prices to market close, changes byline/dateline)
By Frank Tang
NEW YORK, Sept 30 (Reuters) - Gold dipped on profit-taking on Thursday after rallying to record highs, racking up its eighth consecutive quarterly gain as the Federal Reserve stood ready to pump more cash into the U.S. economy to stave off double-dip recession.
Having hit its 11th record high in 13 trading sessions, gold posted a 5 percent gain for the month and the likelihood of more U.S. monetary easing to support the economy lifted silver as well.
Two measures of U.S. regional business activity beat expectations and a drop in weekly jobless claims supported the view that economic activity picked up in the third quarter, which boosted the dollar and in turn weighed on gold.
However, this was unlikely to change the view that the world's largest economy is flagging, which bolstered gold's safe-haven status.
"In the United States, you've got a gradual grind on the economic side, so low GDP growth, the Fed likely to keep rolling over its balance sheet for a while and not increasing interest rates," said Bank of America-Merrill Lynch analyst Michael Widmer.
"In that environment, you have a lot of uncertainty and people are looking to increase their gold holdings."
Spot gold <XAU=> scaled a record high of $1,315.80 an ounce and eased 0.2 percent to $1,306.75 at 2:33 p.m. EDT (1833 GMT). U.S. gold futures for December delivery <GCZ0> settled 70 cents lower at $1,309.60.
COMEX gold open interest eased but held near Tuesday's record at 619,408 lots, and the exchange estimated final gold volume at almost 150,000 lots, 30 percent higher than its 30-day average, preliminary Reuters data showed.
Bullion investors took profits on the last trading day of the third quarter, as the dollar index turned higher after falling to an eight-month low.
A raft of U.S. economic data on Thursday showed claims for unemployment benefit fell last week, while economic growth was a touch higher in the second quarter than previously thought. [
]There is market talk that the Fed, the Bank of England and the Bank of Japan would limit rises in interest rates, which would prove a positive for gold, which tends to benefit in an environment of loose monetary policy.
"With quantitative easing, it is probably no longer a question of if, but when," said Daniel Briesemann, an analyst at Commerzbank.
"The other thing in the mind of investors is that there might be a war (of) currency devaluations in some of the main world currencies like the dollar, yen, and so on," he said. "That is supportive for gold as well."
Bearish technical flags also prompted selling, said Rick Bensignor, chief market strategist at investment banking group Execution Noble.
A combination of upside exhaustion signal and a 90 percent bulls in daily sentiment index suggested investors should lessen positions between $1,306 and $1,322 an ounce, said Bensignor. <^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Graphic on gold's performance relative to other commodities http://r.reuters.com/was95p Graphic in gold's performance vs other assets: http://r.reuters.com/cek95p ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^>
GOLD DRIVEN BY DOLLAR WEAKNESS?
Gold benefited as the dollar was on track for its biggest quarterly drop since the second quarter of 2002 against a basket of six other currencies, down more than 8 percent. The euro was up almost 12 percent, also its best quarterly performance since 2002. [
]In the official sector, the International Monetary Fund sold 18.5 tonnes of gold in August, up from 16.9 tonnes in July as part of its open-market bullion sales plan. [
]Strength in gold prices also helped lift silver to its highest level since 1980, palladium to a 2-1/2 year high and platinum to its strongest since May.
Silver <XAG=> hit a fresh 30-year high at $22.07 an ounce, and was trading down 0.1 percent at $21.78 an ounce, yet still on track for its biggest monthly gain since May 2009.
The metal has climbed on the back of rising gold prices, but continues to outperform its rival. The gold-silver ratio -- how many ounces of silver are needed to buy an ounce of gold -- hit a low at 59.7 on Thursday, its weakest since last October.
Platinum <XPT=> hit a four-month high at $1,664.00 an ounce and rose 0.5 percent at $1,654, while palladium <XPD=> was also trading up 0.5 percent at $566.00, having earlier touched its highest since March 2008 at $581.50 an ounce. Prices at 2:46 p.m. EDT (1846 GMT)
LAST/ NET PCT YTD
CLOSE CHG CHG CHG US gold <GCZ0> 1309.60 -0.70 -0.1% 19.5% US silver <SIZ0> 21.688 0.233 0.0% 28.8% US platinum <PLF1> 1658.60 2.00 0.1% 12.8% US palladium <PAZ0> 560.30 9.60 1.7% 37.0% Gold <XAU=> 1308.20 -0.60 0.0% 19.3% Silver <XAG=> 21.80 -0.07 -0.3% 29.5% Platinum <XPT=> 1653.50 7.75 0.5% 12.8% Palladium <XPD=> 566.00 2.55 0.5% 39.6% Gold Fix <XAUFIX=> 1307.00 -4.00 -0.3% 18.4% Silver Fix <XAGFIX=> 22.07 20.00 0.9% 29.9% Platinum Fix <XPTFIX=> 1662.00 12.00 0.7% 13.4% Palladium Fix <XPDFIX=> 573.00 5.00 0.9% 42.5% (Additional reporting by Amanda Cooper and Jan Harvey in London; Editing by Marguerita Choy)