Copper holdings backing physical copper exchange-traded product reduced by 32% to 2,322 tonnes on June 16 from 3,399 on June 15, Reuters reports. Holdings in physical aluminum increased to 50 tonnes on June 11 from 25 tonnes on June 10.

Holdings backing lead ETP remained unchanged at 25 tonnes. Nickel, tin and zinc holdings were also constant at 78 tonnes, 165 tonnes and 25 tonnes, respectively. The products are traded on the London stock Exchange.

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