Methodology

How numbers are sourced, calculated, and labeled for trust, reproducibility, and future paid analytics.

Source hierarchy

Tier 1

Official issuer / regulator publication (NOC statement, official report, exchange bulletin).

Tier 2

Official statistical body / intergovernmental publication (OPEC, EIA, JODI, port authority reports).

Tier 3

Professional market reporting used as a fallback (for context, not preferred for benchmark construction).

Numbers on public pages are indicative and tied to the publication cadence of the upstream source.

Core 5 formulas

Lead series

Arab Light OSP vs Brent spread = Arab Light reference value - Brent reference value.

Event baseline

For each series, baseline is stored at event date (currently 2026-02-01). Change = current - baseline.

Display logic

If no new official release is available, last confirmed value is retained with latest ingestion timestamp.

Coverage and cadence (current model)

Series	Primary source type	Typical cadence	Status label
Arab Light OSP vs Brent	NOC + benchmark reference	Monthly / release-driven	Official cadence
Murban	Exchange/NOC disclosure	Daily to monthly (stream dependent)	Official cadence
Oman/Dubai average	Benchmark methodology stream	Daily / settlement cadence	Methodology-derived
Basra Medium	SOMO release	Monthly / release-driven	Official cadence
Kuwait Export Crude	KPC release	Monthly / release-driven	Official cadence

Quality policy

Provenance

Every displayed figure should map to a source name and source URL.

No synthetic prices

Public values are not randomly generated; they should represent latest stored observations.

Transparency

Formula definitions remain public for all free-tier headline metrics.

Paid tier direction

Future paid features should add depth (scenario dashboards, route stress, disaggregated flows), not hide core methodology.