Data standards
Sources and methodology
The definitions, dates, units and limitations behind the price explorer and the scenario tools.
Historical snapshot
The bundled snapshot includes 22 dates from 5 October to 3 November 2026. Data was checked on 6 November 2026. It is a fixed historical sample. For updates and corrections, consult the original EIA pages.
Join and calculation
Pair Cushing WTI spot and Europe Brent spot by exact observation date. Exclude dates with a missing observation in either series. Calculate Brent minus WTI in USD per barrel. Display two decimals and do not interpolate across weekends or gaps.
Price-source boundaries
Listed futures specifications and physical price methodologies are explained and linked. No exchange settlements, subscription assessment values or live proprietary prices are republished.
Site calculations
The labs use hypothetical user inputs. Their CSVs preserve the assumptions and calculated results for review. Rounded displayed figures may differ from a calculation using already-rounded intermediate figures.
Maintenance
When extending the sample, verify both series with the primary tables, update the data window and dated headline values, recalculate the research note and repeat browser checks.