Early warning of tariff pressure before it hits sourcing costs — country exposure, HS-chapter granularity, and per-event sector impact.
PEPIndex gives supply-chain strategy teams a daily early-warning signal for tariff pressure — before announced rates become applied costs. Country-level exposure, HS-chapter granularity, and sector-level price impact are all available via the API.
When a 145% tariff is announced on Chinese imports, procurement teams face a difficult question: will this rate actually apply to your product categories, your supplier countries, and your import timeline? Historical data shows the answer is often "not exactly."
The statutory-vs-applied gap — the difference between the headline tariff rate and the rate actually collected at the border — is the quantity PEPIndex measures on every trade event. It varies enormously by action: economy-wide it is modest (Cavallo et al. measure 27.7% statutory against 23.8% applied across their sample), but on a headline action it can exceed 100 points — the tracked Liberation Day benchmark announced 145% on China and settled at 28.3% applied. PEPIndex tracks this gap per event using live USITC DataWeb data, so sourcing teams can model actual cost exposure rather than worst-case scenario rates.
| Signal | Data | Update cadence |
|---|---|---|
| Country tariff exposure | Applied rates at HS-2 chapter level for 15 countries: CN, MX, CA, JP, KR, VN, TW, DE, GB, FR, IT, BR, IN, TH, TR | Monthly (USITC DataWeb) |
| Per-event sector impact | COICOP-3 sector price impact for each tariff event — Household Furnishings, Apparel, Food, Industrial, etc. | Every 6 hours (pipeline) |
| Statutory vs. applied gap | Announced rate minus actually-applied rate per event, in percentage points | Monthly (USITC) |
| Policy pressure score | Daily PEPI composite (0–100) — higher = more reversal/exemption pressure in the current environment | Every 6 hours |
| Federal Register linkage | EOs, proclamations, memoranda, and USTR notices linked to each tariff event, with effective dates | Daily (Federal Register API) |
/api/v1/tariff-ratesSTANDARD/api/v1/tariff-rates/detail?country=CNSTANDARD/api/v1/events/{id}/sector-impactSTANDARD/api/v1/events/{id}/economic-impactPREMIUM/api/v1/indexFREE
A sourcing team tracking China import exposure can pull /api/v1/tariff-rates/detail?country=CN
to get the current applied rate at each HS-2 chapter. Combined with /api/v1/events
filtered to domain=trade&status=monitoring, they can identify which active
threats might affect their product categories before the next procurement cycle.
The statutory_applied_gap field on each event shows, in percentage points,
how much of the announced tariff has been reversed through exemptions and carve-outs —
the critical input to landed-cost modeling.
Daily alert webhook: Poll /api/v1/index or subscribe to alerts when the PEPI score crosses a threshold.
Sourcing dashboard: Embed live tariff rates via /api/v1/tariff-rates/detail for each country in your supplier network.
Procurement model input: Use applied_rate_final and statutory_applied_gap from event data to build realistic tariff-cost scenarios.
Snowflake Marketplace: A free live sample of PEPIndex (30-day events, 90-day index, benchmark-event economics) is on the Snowflake Marketplace; full-table access is via the REST API or a private enterprise data share.
Standard tier includes tariff rates, events, sector impact, and economic indicators.
View all endpoints →