* Zinc stocks up more than 40 percent since early August
* Zinc hovers near 5-year lows
* Tin hits three-week low (Adds background, closing prices)
By Mamidipudi Soumithri and Pratima Desai
LONDON, Sept 22 (Reuters) - Funds raided copper again on Tuesday, pushing prices to three-week lows in the market’s biggest single-day loss in more than two months on persistent worries about demand from top consumer China and a stronger dollar.
Benchmark copper on the London Metal Exchange closed down 3.6 percent at $5,080 a tonne, its biggest one-day loss since July 7, when funds were again behind the fall.
The metal used in power and construction hit a low at $5,036 a tonne after New York opened and U.S.-based funds seeing copper’s losses and a higher dollar jumped on the bandwagon.
Chinese government efforts to stimulate growth by easing fiscal and monetary policy have yet to bear fruit. Poor prospects can be seen in recent data such as industrial production, which suggests little improvement.
“Prices are falling due to growth worries primarily related to China,” said Julius Baer analyst Carsten Menke said.
Prices of industrial metals are also under pressure from the higher U.S. currency, which makes dollar-denominated commodities more expensive for non-U.S. firms. The dollar was up about 0.4 percent, and has gained about 6 percent in this year against a basket of currencies.
“It’s just down to sentiment, which is poor, really poor,” a trader said. “There’s reasonable volume and we’ve been triggering sell stops on the way down with everyone involved across the board, including our friends in the Far East.”
Also behind worries about growth was the U.S. Federal Reserve, which last week opted to keep interest rates on hold in a bow to worries about the global economy, which was interpreted by analysts as a reference to China.
“Today focus changed to fundamentals and to what is happening in China,” SP Angel analyst Sergey Raevskiy said.
Three-month aluminium fell 1.7 percent to $1,589 per tonne. Zinc lost 1.8 percent to $1,628 per tonne, to near the 5-year lows hit last week.
Fears that substantial amounts of zinc could be heading to world markets have weighed further on fast falling prices, as major producer Glencore implements a plan to liquidate some of its inventories to help pay off debt.
Stocks of zinc in LME registered warehouses have risen more than 40 percent to above 600,000 tonnes since early August.
“Zinc technically looks to be targeting the 2010 lows at $1,577,” a trader said.
Lead ended down 1.4 percent at $1,683 per tonne and nickel slid 1.7 percent to $9,690 per tonne.
Tin fell 2.3 percent to $14,800 a tonne after earlier hitting a three-week low at $14,560 a tonne. The soldering metal is under pressure from expectations of higher shipments from top exporter Indonesia.
Three month LME copper
Most active ShFE copper
Three month LME aluminium
Most active ShFE aluminium
Three month LME zinc
Most active ShFE zinc
Three month LME lead
Most active ShFE lead
Three month LME nickel
Most active ShFE nickel
Three month LME tin
Most active ShFE tin
Additional reporting by Eric Onstad; Editing by Keith Weir and David Evans