Methodology
Trust requires transparency. Here is exactly how OleaIndex calculates prices, which sources we use, and how we govern data quality.
The first dedicated Tunisian olive oil price reference.
OleaIndex is the only platform that publishes a transparent Tunisian olive oil price benchmark by specific variety — Chemlali and Chetoui. Every figure is a field observation, published with the date it was recorded.
This is NOT a composite index.
The Tunisian Variety Index relies on 100% proprietary data built through direct field relationships with Tunisian market participants. External aggregators and public sources are used solely as internal watchdog references to verify market alignment — they are never blended into the final published variety price.
Transparent by structure, not by promise.
For non-Tunisian origins, OleaIndex blends the market and institutional price sources available for each origin. Spain uses fixed authority weights; other origins are averaged across whatever sources are fresh. Freshness decay drops stale data automatically, and a source that goes offline redistributes its weight to the active ones.
Poolred, Oleista, the EU Commission feed and one confidential mill-level contributor currently carry the Spanish blend. That contributor is unnamed because its terms prohibit republishing its data under its name; the data is used, the name is withheld, and we say so rather than omit it. The Junta de Andalucía AICA feed is configured at 10% but is not yet delivering machine-readable data, so its weight redistributes across the active sources until it comes online. Every weight is then scaled by freshness (below).
You never see a stale or unverified price.
Data quality is enforced automatically by the pipeline, not by promises. Freshness decay, per-source health checks and a strict “Data Pending” rule keep stale or missing data out of the published index.
How does OleaIndex calculate the olive oil price?
For non-Tunisian origins, OleaIndex publishes a composite: the market and institutional price sources available for each origin (such as Poolred, Oleista, the EU Commission’s DG AGRI feed, ISMEA and Olimerca) are blended, weighted by source authority and freshness, and recomputed every day. The Tunisian Variety Index is different — it is built from 100% proprietary field data and is never blended with external sources.
How often are OleaIndex prices updated?
Every day. Prices are recomputed daily; each public price page shows the date it was last updated. When fresh data for an origin is not available, the platform shows "Data Pending" rather than repeating a stale figure.
What is the Tunisian Variety Index?
It is the first Tunisian olive oil price reference published by specific variety — Chemlali (Sfax) and Chetoui (Zaghouan). It relies entirely on proprietary data collected through direct relationships with Tunisian market participants. Each figure is a field observation and carries the date it was recorded, rather than being restated as a fresh price every day. External aggregators are used only as internal watchdog cross-checks and are never blended into the published variety price.
What data sources does OleaIndex use?
Live sources currently feeding the index include Poolred, Oleista, the EU Commission’s official DG AGRI price feed and one confidential mill-level contributor for Spain; ISMEA and Oleista for Italy and Greece; Olimerca as trade-press cross-reference; and a FRED/IMF global series. One Spanish contributor is published without a name because its terms prohibit republishing its data under its name — withholding a name is standard practice for price reporting, and we would rather disclose that than drop the source from this list silently. MAPA’s official weekly national bulletin and the Junta de Andalucía AICA feed are used as reference cross-checks; AICA is not yet delivering machine-readable data, so it does not move the published number.
What happens when a price source goes stale or offline?
Freshness decay is applied automatically: data 7–29 days old has its weight halved, and data 30+ days old is dropped from the blend entirely, with its weight redistributed to fresher sources. A per-source health watchdog flags any feed that stops reporting. If no fresh data is available, the price shows "Data Pending" — never a stale, modelled or estimated number.
Questions about a specific figure or calculation?
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