China metals activity Report Interpretation

Overview

This weekly tracker assesses Chinese visible inventories, steel activity, iron ore flows and freight rates as indicators of metals consumption. JPMorgan identifies divergent conditions: aluminium and zinc drawdowns are strong, while copper demand is less responsive at elevated prices and steel-sector margins continue to deteriorate.

Core views

JPMorgan uses weekly Chinese inventories as a proxy for consumption and reports continued drawdowns across industrial metals for the week ended 11 September 2026. Copper visible inventory fell by 10kt, and total inventory of 94kt remained low and below the historical range. However, the pace of destocking over roughly the previous two months was below the historical average ahead of China’s second seasonal copper-demand peak. The report attributes this weakness partly to Chinese sensitivity to high copper prices; JPMorgan Commodities Research estimated Chinese copper consumption fell 1.4% year on year in July and 4.6% over the first seven months of 2026. The Yangshan premium and LME copper comparison is cited as evidence that physical Chinese buying has stepped down as LME copper reached an all-time high. The report notes that LME copper fell about 4% intraday after Reuters reported that the U.S. government had not yet decided whether to impose tariffs on refined copper imports. JPMorgan Commodities Research nevertheless continues to expect U.S. copper import tariffs. In its no-tariff scenario, it estimates copper downside of about $12,000/t, with the effective price floor dependent on renewed dip-buying from China. Aluminium presents a stronger consumption signal. Visible aluminium inventory fell 19kt in the latest week, continuing a faster-than-historical destocking trend that has persisted since mid-May. Total Chinese visible aluminium inventory was about 796kt, back within its five-year range after more than three months of drawdowns. For zinc, the LME price rose 5% over the preceding month as the export arbitrage opened in July. The report describes significant Chinese destocking, including a 52kt weekly decline in its narrative, while its figure separately shows a 15kt weekly visible-inventory decline. Although total zinc inventory of 218kt remained the highest since 2022, it had fallen sharply over the prior two weeks. JPMorgan highlights strong net investor positioning and expects continued Chinese outflows to ease market tightness; this could reduce zinc prices to about $3,500/t by year-end. Iron ore and steel indicators were weaker. Brazil-to-China bulk freight rose to $42.4/t from $41.1/t a week earlier, while Australia-to-China freight fell to $17.9/t from $18.8/t; both routes remained well above levels three weeks earlier, putting pressure on miners’ realised FOB iron ore prices. China weekly steel production was 7.94Mt, down 7.4% year on year, and apparent steel consumption was 8.12Mt, down 3.7% year on year. The report also cites a 872Mt annualised Chinese steel-output run rate for the ten days ended 31 August, down 4% from the prior period and 1% year on year, near the bottom of the seasonal range. Supply data were mixed: China iron ore arrivals at 47 ports rose 38.3% week on week and 4.9% year on year to 27.00Mt, while global iron ore shipments fell 6.0% week on week but rose 21.8% year on year to 33.58Mt. At the same time, Chinese steel input costs had surged over approximately two months, with coking coal up more than 30%. JPMorgan calculates that average steel-mill margins deteriorated further to losses exceeding RMB600/t, linking weak production and demand conditions with rising input-cost pressure.

Analysis framework

The report tracks high-frequency visible inventories, shipment volumes, freight rates, steel production, apparent consumption and mill margins. It compares current weekly changes with historical seasonal ranges and prior-year or prior-period data, using inventory drawdowns as a proxy for physical consumption and relating supply, freight and input-cost trends to metals-market tightness and miner or steelmaker economics.

Methodology notes

• Industry AnalysisSupply-demand framework

  High-frequency inventory, shipment, production and consumption tracking

  The report treats inventory changes as a proxy for consumption and combines them with supply flows and steel activity to assess market balance.

• Industry AnalysisUpstream-Midstream-Downstream Transmission

  Freight and raw-material-cost transmission to miners and steel mills

  The report links higher freight rates to realised iron ore prices for miners and higher coking-coal costs to weaker steel-mill margins.

• Industry AnalysisVolume-price decomposition

  Comparison of metal prices with physical buying and inventory movements

  Copper’s elevated price is assessed alongside weaker Chinese physical buying and below-trend destocking, while zinc prices are considered alongside export-driven inventory outflows.

Key data

• China copper visible inventory94ktWeek ended 11 September 2026; low and below the historical range.
• China copper destocking-10ktLatest weekly change; below the historical seasonal trend.
• China copper consumption-1.4% YoY in July; -4.6% in 7M26JPMorgan Commodities Research estimates.
• China aluminium visible inventory796ktBack within the five-year range after more than three months of destocking.
• China aluminium destocking-19ktLatest weekly change; above the historical trend.
• China zinc visible inventory218ktStill the highest level since 2022 despite a sharp recent decline.
• Brazil-China iron ore freight$42.4/tUp from $41.1/t the prior week.
• China weekly steel production7.94MtDown 7.4% year on year.
• China weekly steel apparent consumption8.12MtDown 3.7% year on year.
• Average China steel mill marginLosses >RMB600/tDeteriorated further as input costs rose.

Impact & implications

The tracker points to uneven Chinese metals demand: strong aluminium and zinc inventory drawdowns contrast with copper’s below-normal seasonal destocking. For iron ore, elevated freight costs may weigh on miners’ realised FOB prices, while weak steel activity and higher coking-coal costs are intensifying losses at Chinese steel mills.

Risks

• Copper pricing is sensitive to the unresolved U.S. refined-copper tariff decision and to whether Chinese dip-buying returns.
• Continued zinc outflows from China could reduce market tightness and lower prices toward approximately $3,500/t by year-end.
• Higher iron ore freight and coking-coal costs may continue to pressure miners’ realised prices and Chinese steel-mill profitability.

What to watch

• The pace of Chinese copper destocking during the second seasonal demand peak.
• U.S. policy on refined copper import tariffs and evidence of renewed Chinese copper buying.
• Whether aluminium destocking remains above trend and zinc exports continue to reduce inventories.
• China steel production, apparent demand, iron ore arrivals, freight rates and steel-mill margins.