Prices on the London Metal Exchange were mostly lower on the last trading day of the year, with copper virtually flat at $9,695 a tonne by 0708 GMT, after MMG Las Bambas mine in Peru said it would resume operations that had been halted due to a road blockade.
Copper on the Shanghai Futures Exchange ended daytime trading 0.5% higher at 70,380 yuan ($11,043.46) a tonne.
Both London and Shanghai copper benchmarks have gained more than 20% in 2021.
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