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NAI 500 — Proprietary base-metals supply-chain price and contract-term series maintained by an editorial desk: copper concentrate treatment/refining charge (TC/RC) observations including negative spot levels, quarterly and annual benchmark settlement outcomes, regional spot sulfuric acid price series (Chinese acid shown up roughly fivefold over 2.5 years), unroasted pyrite import volumes (~392,000 t in the first four months of 2026, highest for that period since 2014), and concentrate feedstock composition/impurity commentary (sulfur and iron content, acid-plant stress, slag and copper-loss p…
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Proprietary base-metals supply-chain price and contract-term series maintained by an editorial desk: copper concentrate treatment/refining charge (TC/RC) observations including negative spot levels, quarterly and annual benchmark settlement outcomes, regional spot sulfuric acid price series (Chinese acid shown up roughly fivefold over 2.5 years), unroasted pyrite import volumes (~392,000 t in the first four months of 2026, highest for that period since 2014), and concentrate feedstock composition/impurity commentary (sulfur and iron content, acid-plant stress, slag and copper-loss penalties).
From 10 yearsCoverage FinancialsAsset class Commodities · Equities
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NAI 500 — Proprietary base-metals supply-chain price and contract-term series maintained by an editorial desk: copper concentrate treatment/refining charge (TC/RC) observations including negative spot levels, quarterly and annual benchmark settlement outcomes, regional spot sulfuric acid price series (Chinese acid shown up roughly fivefold over 2.5 years), unroasted pyrite import volumes (~392,000 t in the first four months of 2026, highest for that period since 2014), and concentrate feedstock composition/impurity commentary (sulfur and iron content, acid-plant stress, slag and copper-loss p…
NAI 500 offers (Alternative, Fundamental) — Thousands of dated article records plus the embedded observation series behind them — realistically tens of thousands of individual price, charge and volume data points across the copper concentrate and acid complex if the desk's historical files are compiled.
Training concentrate-valuation and smelter-margin models that must stop pricing copper metal alone; backtesting acid-byproduct revenue attribution to listed smelters; building proprietary TC/RC and sulfuric acid indices for hedge and commodity-desk trading; contract benchmarking for miners negotiating annual treatment charges; supply-side copper models that use pyrite and feedstock-sulfur flows as a leading indicator.
The data is with 10 years of history.
Coverage spans Other, US, China/HK, UK; Financial Exchanges & Data; alternative, fundamental; commodities, equities.
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