Start with the source
Every observed value retains its publisher, series, unit, location, period and retrieval lineage.
Methodology
Understand what each number represents.
NETSPIRES separates sourced facts, calculations, assumptions and model outputs so upstream movement is never presented as a supplier quote.
Calculate transparently
Derived values use stated equations and exact units. Calculations require a complete set of stated inputs.
Version the midpoint
Low, base and high values are documented reference assumptions with route, geography, confidence and review status.
Show uncertainty
The range communicates sensitivity. Model output remains separate from observed market data and supplier prices.
Weekly data update control
What is checked, and where an approved change appears.
Source-native release timing does not become weekly merely because NETSPIRES checks each source weekly. Sunday collection creates a private review candidate; the website changes only when the exact snapshot and weekly issue pass validation and Human approval. Census is retained for separate historical/manual research and is not part of this weekly candidate.
| Source | Native cadence | Sunday check | Approved web sections | Interpretation | Evidence |
|---|---|---|---|---|---|
| U.S. Energy Information AdministrationSRC-0001 · Petroleum spot prices | series dependent; monthly publication view | Check WTI, Brent and Mont Belvieu propane for new or revised observations | Market pulse; Process flow detail; Cost logic; Weekly Intelligence | OBSERVEDDIRECT benchmark; PROXY for resin cost pressure | Official source (opens in a new tab) |
| U.S. Energy Information AdministrationSRC-0002 · Natural Gas Prices | daily or monthly by series | Check Henry Hub and U.S. industrial gas for new or revised observations | Market pulse; Process flow detail; Cost logic; Weekly Intelligence | OBSERVEDDIRECT benchmark; not a plant tariff | Official source (opens in a new tab) |
| U.S. Bureau of Labor StatisticsSRC-0003 · Producer Price Index commodity series | monthly | Check WPU072, WPU0662, WPS0662 and WPS066212 for release or revision | Market pulse; Weekly Intelligence; Methodology | OBSERVEDPROXY for broad resin or chemical direction | Official source (opens in a new tab) |
| U.S. International Trade CommissionSRC-0005 · Harmonized Tariff Schedule | irregular revisions | Check the official current release identity and approved resin headings | Trade; Weekly Intelligence; Methodology | OBSERVEDDIRECT tariff reference; not a legal determination | Official source (opens in a new tab) |
Evidence cutoffSUNDAY 19:00
Human gateSUNDAY 21:00
Approved releaseMONDAY 06:00
Fail-closed rule: a failed retrieval, unmatched hash, unresolved approval or blocked right leaves the currently approved public data unchanged. BLS indices are never presented as observed resin transaction prices; USITC raw machine-readable payloads remain private.
Use these questions in a supplier discussion
- Which benchmark, geography and period support the request?
- Which production route and feedstock apply to this material?
- How much of the upstream change is contractually passed through, and with what lag?
- Which conversion, logistics, tariff or grade-specific factors changed?
- What evidence would reverse the conclusion?