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Classify commodities and verify quote units
Updated 4 August 2026 · 2 min read · 14 Contents
Plain-language meaning
A commodity identity combines the physical or reference product, grade, location, quote unit and benchmark contract. A broad name such as gold or wheat is not enough to make two numbers comparable.
Why it is useful #
A stable taxonomy helps readers find related benchmarks without treating them as interchangeable. Unit checking prevents a cents-per-pound series from being read as dollars per tonne.
Where it appears and the workflow #
Open Commodity Intelligence, search the taxonomy, select the exact benchmark and read its group, subgroup, symbol and quote unit before comparing or exporting it.
Calculation or source #
XMarketRadar owns the benchmark mapping and cites the CC-BY comcat vocabulary as a classification reference. Live price identity remains the provider ticker shown by the Commodity board.
Prerequisites, inputs, period and unit #
Inputs are the taxonomy code, benchmark symbol, product group and displayed native quote unit. Taxonomy rows are classifications, not prices and have no market timestamp.
Worked example #
A wheat quote of 620 US cents per bushel and an illustrative local wholesale price of INR 2,400 per quintal describe different units, locations and market stages; neither can be subtracted without an explicit conversion basis.
What high and low mean #
A higher classification level is broader, not better. Subgroups narrow product family while exact benchmark symbols identify the displayed reference.
Positive, negative and zero #
Positive and negative do not apply to taxonomy. A genuine quoted zero remains 0; absent identity or unit evidence remains unavailable.
Limitations and common mistakes #
Taxonomies do not establish deliverability, quality equivalence, conversion factors or price comparability. Aliases can be ambiguous across countries.
Market-specific differences #
MCX, CME, CBOT, NYMEX, COMEX and physical wholesale markets publish different contract units, grades, currencies and delivery rules.
Suggested next steps #
Next, inspect the source link and as-of timestamp, then continue to the forward-curve and agricultural-fundamentals chapters.
Educational use only #
This guide explains descriptive research evidence. It is not investment advice, a price prediction, a recommendation, a claim of predictive accuracy, or an instruction to buy, sell, rebalance or place an order.