Large Chinese smelters acted calmly during the period, but small-scale smelters showed higher buying interest, with trader and smelter sources reporting business with treatment and refining charges between $85-95 per dry metric tonne and 8.5-9.5 cents per lb.
The Metal Bulletin Copper Concentrates Index was calculated at $84.20 per dry metric tonne/8.42 cents per lb on August 14, compared with $83.20/8.32 cents on July 31.
Miner-to-trader deals were still taking place between the high $60/6s and high $70/7s, albeit in lower volumes than were seen in July.
One Antamina tender for fourth-quarter shipment was reported by traders to have concluded in the high $70/7 cents, while a private sale of other high-grade clean concentrates was reported at about $68/6.8 cents.
BHP also tendered a parcel of Antamina shipping in the...