Trading sources generally agreed it would be cost-effective to take the copper back into a depleted central reserve as it had already served its purpose in taking advantage of long-term backwardation on the London Metal Exchange ( LME ) .
<response> Trading sources generally agreed it would be cost-effective to take the copper back into a depleted central reserve as it had already served its purpose in taking advantage of long-term backwardation on the <organization>London Metal Exchange</organization> ( <organization>LME</organization> ) . </response>