Copper Concentrate TC Index Hits Record Low, Smelter Pressures Mount Amid Maintenance and Supply Constraints

Published: Sep 18, 2026 15:02
On September 18, 2026, the SMM spot copper concentrate TC index fell to a record low of -$221.89/dmt. The 2026 benchmark processing fee for imported copper concentrate long-term contracts is zero, and copper anode RCs are also at historical lows, with copper anode supply remaining tight. By-product sulphuric acid prices have been pulling back for about two and a half months, and by-product profit contribution continues to shrink, driving mounting pressure on smelting operations. From October to November, multiple domestic copper smelters plan to carry out maintenance, with limited cold material replenishment. Under raw material constraints, copper cathode production faces downward pressure. According to market sources, some smelters have already signaled intentions to cut production and have advised clients that long-term contract deliveries will be reduced, though the extent remains unclear. Going forward, attention will focus on the implementation of maintenance, the scope of production cuts, and the marginal impact of sulphuric acid price trends on smelter operating rates. 

Data Source Statement: Except for publicly available information, all other data are processed by SMM based on publicly available information, market communication, and relying on SMM's internal database model. They are for reference only and do not constitute decision-making recommendations.

For any inquiries or for more information, please contact: lemonzhao@smm.cn
For more information on how to access our research reports, please contact:service.en@smm.cn
Related News
Available supply remains tight, Shanghai spot copper premiums hit a new high for the year [SMM SHFE copper spot]
7 mins ago
Available supply remains tight, Shanghai spot copper premiums hit a new high for the year [SMM SHFE copper spot]
Read More
Available supply remains tight, Shanghai spot copper premiums hit a new high for the year [SMM SHFE copper spot]
Available supply remains tight, Shanghai spot copper premiums hit a new high for the year [SMM SHFE copper spot]
[SMM Shanghai Spot Copper] Looking ahead to next week, the tight supply-side pattern is expected to continue supporting spot premiums. According to SMM, from October to November, multiple domestic copper smelters will successively enter planned maintenance periods. Against the backdrop of persistently tight supply of copper concentrates and blister copper and copper anode, production and shipment pace at some smelters may be affected to a certain extent, limiting growth in available market supply. Meanwhile, port congestion in Shanghai has not yet fully eased, and the arrival pace of imported copper still carries some uncertainty, making it difficult for imported supply to see a significant near-term increase. On the demand side, with copper prices staying high, downstream purchases remain primarily need-based, with limited acceptance of high premiums. Overall, if arrivals do not increase significantly next week, spot premiums in the Shanghai market are expected to continue to consolidate at highs.
7 mins ago
Copper Prices Recover, Marginal Improvement in Demand for Copper Scrap [SMM Secondary Copper Daily Review]
10 mins ago
Copper Prices Recover, Marginal Improvement in Demand for Copper Scrap [SMM Secondary Copper Daily Review]
Read More
Copper Prices Recover, Marginal Improvement in Demand for Copper Scrap [SMM Secondary Copper Daily Review]
Copper Prices Recover, Marginal Improvement in Demand for Copper Scrap [SMM Secondary Copper Daily Review]
10 mins ago
Spot supply is tight in stages as demand heats up, and imported copper premiums shot up rapidly this week [SMM Yangshan Copper Weekly Review]
1 hour ago
Spot supply is tight in stages as demand heats up, and imported copper premiums shot up rapidly this week [SMM Yangshan Copper Weekly Review]
Read More
Spot supply is tight in stages as demand heats up, and imported copper premiums shot up rapidly this week [SMM Yangshan Copper Weekly Review]
Spot supply is tight in stages as demand heats up, and imported copper premiums shot up rapidly this week [SMM Yangshan Copper Weekly Review]
1 hour ago