Comparable prices first
A meaningful benchmark compares prices for a defined grade, origin, moisture basis, delivery term, currency, and observation period. Farmgate, processed, and FOB quotations are distinct series.
The composite index
A proposed composite is the sum of eligible prices multiplied by disclosed weights, divided by the sum of those weights. Contributor rules, weighting, and outlier controls require approval before live publication.
Reference data currently displayed
The supplied composite is $185.50/kg with a +1.8% monthly reference change. Madagascar gourmet is $210/kg, Uganda red/split $165/kg, and Indonesia extraction $140/kg. These are supplied examples, not independently collected observations.
History and data quality
Chart histories and regional supply allocations are illustrative. No 1-, 5-, or 10-year verified time series is connected. Live data requires dated sources, validation, revision records, and transparent coverage.