Copper Rises on London Exchange on Declining Stockpiles, Output By Chanyaporn Chanjaroen April 24 (Bloomberg) -- Copper rose in London as declining stockpiles and reduced production from Australia to Latin America crimped supply. Tin advanced to a record for a fourth day. Stockpiles at exchanges in London, New York and Shanghai have shrunk 25 percent this year, to less than four days of global demand. BHP Billiton Ltd. said copper output dropped 8 percent in the first quarter from a year earlier because of declines at Chile's Escondida, the world's largest copper mine, and Olympic Dam in Australia. ``The market is quite short,'' said Andy McClelland, head of industrial metals at Sucden (U.K.) Ltd. in London. Continued declines in stockpiles may mean copper prices above $8,700 a metric ton, he said. The contract for delivery in three months on the London Metal Exchange advanced $85, or 1 percent, to $8,640 a ton as of 1:09 p.m. The contract traded at a record $8,880 April 17. Copper is in its seventh year of higher prices, buoying sales for mining companies including Freeport-McMoRan Copper & Gold Inc. The world's second-largest copper producer yesterday said first-quarter profit more than doubled. LME-monitored copper stockpiles fell 275 tons to 112,200 tons, the exchange said today. Combined with those in Shanghai and New York, they total 178,776 tons, according to Bloomberg calculations. Codelco, the world's biggest copper producer, agreed to pay advances on 2008 bonuses to striking workers from three of four unions for employees of Codelco contractors at the El Teniente mine, Mining Minister Santiago Gonzalez said yesterday. The offer was rejected by the Confederation of Copper Workers, known as CTC, the union that started the strike. Workers Walk Out Contract workers walked out last week after demands for higher pay and bonuses weren't met. Tin gained as much as 2.2 percent to a record $24,602 a ton. LME-monitored aluminum inventory expanded 11,900 tons, or 1.2 percent, to 1.04 million tons, the highest since June 4, 2004. Prices dropped $16 to $3,080. Aluminum contracts expiring from July 2010 onwards declined April 22. The contract expiring December 2009 is now the most expensive of all LME aluminum futures, at $3,165 a ton, reflecting expectations for higher prices in that period. Traders are concerned that output problems in producing nations such as South Africa and China may affect future supply, London-based analyst Michael Widmer at Lehman Brothers Holdings Inc. said in a report yesterday. Zinc supply will outpace demand by 215,000 tons this year, while lead production will beat consumption by 26,000 tons, the Lisbon-based International Lead and Zinc Study Group said today in a report. In October, the group projected zinc oversupply of ``just under a quarter of a million tons'' and ``a close balance'' in lead. Lead dropped $44, or 1.6 percent, to $2,765 a ton and zinc added $6 to $2,245. Nickel rose $150 to $28,850. To contact the reporter on this story: Chanyaporn Chanjaroen in London at [EMAIL PROTECTED] Last Updated: April 24, 2008 08:23 EDT Send instant messages to your online friends http://uk.messenger.yahoo.com