Import Price Indices and Trade Balance Data

What the Import Price Index Measures

The Import Price Index is a monthly survey of prices paid by American importers for goods purchased from foreign suppliers. The Bureau of Labor Statistics has published it since 1973. The BLS contacts roughly 20,000 businesses each month — importers, customs brokers, freight forwarders, multinational subsidiaries — and collects actual transaction prices for specific products crossing the US border.

The key word is transaction. The BLS is not collecting list prices, catalog prices, or surveyed estimates. It is collecting the prices written on the invoices that accompany goods through customs. This makes the Import Price Index one of the more reliable price statistics the BLS produces, because the underlying data is contractual, not self-reported sentiment.

The index is calculated at the point of entry — the US port, airport, or land border crossing. This means it captures the full cost of getting the goods to American soil: the foreign manufacturer's price, the international freight charge, insurance, and any other costs incurred before the goods clear US customs. It does not capture what happens after: domestic trucking, warehousing, wholesale distribution, retail markup. Those costs are in the supply chain between the border and the consumer, and they are why import prices do not translate immediately or fully into consumer prices.

The BLS publishes the Import Price Index alongside the Export Price Index in a joint release, usually in the second week of the month following the reference period. The full release covers prices by commodity (food, fuels, industrial supplies, capital goods, consumer goods, automotive vehicles) and by origin country (China, Canada, Mexico, European Union, Japan, and others). For most analytical purposes the all-commodities headline, the petroleum component, and the ex-petroleum component contain the useful signal.

How Import Prices Differ from the CPI

The Consumer Price Index and the Import Price Index both measure prices, but they measure prices at different points in the distribution chain, using different methodologies, covering different universes of goods.

The CPI covers what urban consumers pay at the final point of purchase. It includes rent, medical services, education, haircuts, and restaurant meals — categories that have nothing to do with international shipping. About half the CPI basket by weight is services, and services prices are driven primarily by domestic labor costs, not import prices. The CPI reflects the full retail price, embedded in American distribution margins.

The Import Price Index covers only goods that enter the country from abroad. It excludes services entirely. It excludes domestically produced goods entirely. It measures prices at the border, not in stores. For goods that are imported and then sold at retail, the Import Price Index captures roughly 60 to 80 percent of what will eventually appear in the CPI — the remaining gap is domestic handling, retail markup, and the time lag between when the goods arrive and when they reach consumers.

This gap creates the leading-indicator relationship. When the Import Price Index rises this month, that signal tends to appear in core goods CPI three to five months later, after goods work through distribution channels. When analysts talk about "the pipeline of inflation," this is much of what they mean: the sequence of rising prices working forward from the import dock through the wholesale tier and finally to the consumer receipt.

The CPI also uses a different basket structure. BLS field representatives track specific goods at specific retail locations over time, weighting by consumer expenditure shares. The Import Price Index uses a matched-model approach — tracking the same product at the same border over time — with weights based on import value shares, not consumer expenditure. A category that matters a great deal to importers can have modest CPI weight if consumers spend relatively little of their income on it.

Petroleum vs. Ex-Petroleum: Why the Split Matters

Any serious analysis of import prices requires separating the petroleum component from everything else. This is not a minor methodological preference. It is the difference between reading a supply-chain signal and reading an oil market signal, and they require entirely different analytical tools.

Petroleum and petroleum products account for roughly 10 to 15 percent of total US import value in any given year, depending on the price of crude oil. When crude prices spike — which can happen in days, following a geopolitical event, a Saudi production decision, or an unexpected demand surge — the petroleum import price component can move five to ten percent in a single month. This dwarfs the movement in everything else.

If you look at the all-commodities Import Price Index (FRED: IR) in a month when crude oil has moved sharply, you will see the headline dominated by energy. Everything else — machinery, electronics, apparel, furniture, food — is buried under the crude signal. The ex-petroleum index (FRED: IQ) strips that noise away and shows you the underlying trend in manufactured and agricultural import prices. This is the series that responds to container freight rates, semiconductor supply chains, Chinese manufacturing costs, and agricultural commodity cycles.

Conversely, when you want to analyze how tanker disruptions feed into energy prices, the petroleum import price index (FRED: IRPE) is your series. A closure in the Strait of Hormuz or a Houthi missile campaign in the Red Sea affects tanker rates for crude oil and petroleum products before it affects anything else. The petroleum import price index will reflect that within weeks. The ex-petroleum index will barely move on the same event.

The practical discipline is this: before reading any import price release, decide which question you are answering. If the question is about energy and tanker markets, read the petroleum series. If the question is about manufacturing supply chains and consumer goods inflation, read the ex-petroleum series. Reading the headline without this separation produces analytical confusion.

The Trade Balance and What It Reveals About Shipping Demand

The trade balance (FRED: BOPGSTB) is published monthly by the Bureau of Economic Analysis, about five weeks after the reference period. It reports the dollar value of US exports and imports separately, and the difference between them. A negative number — a deficit — means the United States imported more in dollar terms than it exported. The US has run a persistent goods trade deficit since 1975.

For shipping analysis, the trade balance is not primarily a political document or a statement about competitiveness. It is a measurement of trade flows in dollar terms, and the distinction between dollar terms and volume terms is critical.

Consider what happens when a maritime disruption raises freight rates. The physical volume of goods crossing the Pacific — the number of containers, the tons of steel, the barrels of oil — may stay roughly the same in the short run. Importers have purchase orders to fill, retailers have shelves to stock, manufacturers have production lines to run. But each container now costs more to ship. The letter of credit is larger. The invoice at the border is higher. When the BLS records that higher border price in the Import Price Index and the BEA records the higher dollar value of those same imports in the trade balance, you see the freight cost increase flowing into both statistics simultaneously.

This is the mechanism: a freight rate spike causes the trade deficit to widen even at unchanged import volumes, because the same goods now cost more to land. The wider deficit reflects higher shipping costs passing through the trade accounts before they reach retail prices.

The more interesting signal comes three to six months after a major disruption. If freight rates remain elevated long enough, importers begin to pull back orders. The cost of bringing goods from overseas rises to the point where domestic alternatives become competitive, or where buyers simply defer purchases. Import volumes fall. The trade deficit narrows — not because the economy is stronger, but because high logistics costs have destroyed some portion of import demand. This demand destruction shows up in the BDI, in container booking volumes, and eventually in the trade balance itself as import dollar values fall faster than export values.

The 2021–2022 container freight rate spike provides a clean example. Container rates from Shanghai to Los Angeles rose roughly tenfold between early 2020 and September 2021. US import values surged, widening the goods trade deficit to record levels. By mid-2022, as retailers found themselves overstocked at elevated landed costs, import orders collapsed. Container rates fell ninety percent from peak to trough between September 2021 and late 2023. The trade deficit narrowed materially over the same period, partly reflecting actual demand slowdown and partly reflecting falling import prices.

Import Prices as a Leading Indicator for Consumer Inflation

The forward-looking value of the Import Price Index lies in the lag between what happens at the border and what happens in the grocery store or electronics retailer. That lag is not fixed — it varies by product category, by the degree to which importers hedge currency and commodity risk, by how full retailer inventories are, and by how much competitive pressure exists in any given market. But it exists reliably enough to be analytically useful.

The transmission works through three channels. First, rising import prices directly raise input costs for manufacturers who use imported components or raw materials. A clothing manufacturer importing fabric from Bangladesh, a furniture maker importing timber from Canada, a car assembler importing semiconductor chips from Taiwan — each faces higher production costs when import prices rise, and each passes some portion of those costs downstream.

Second, rising import prices raise the cost of finished goods sold directly to consumers at retail. When a retailer imports finished televisions, clothing, or toys, the higher landed cost either compresses margins or raises shelf prices. In a competitive market with thin margins, much of the cost passes through. The timing depends on how much inventory the retailer is sitting on — a retailer with eight months of inventory insulates consumers from the import price signal for eight months, then passes through the full increase abruptly.

Third, and most indirectly, rising import prices affect domestic producers who compete with imports. When imported goods get more expensive, domestic producers have room to raise their own prices without losing share. This competitive pricing effect is real but hard to quantify and tends to show up later than the direct pass-through.

The practical implication is that a sustained move in the ex-petroleum Import Price Index is a forward signal for core goods CPI. The research consensus — confirmed in work by the Federal Reserve, the IMF, and numerous academic studies — puts the peak pass-through at roughly thirty to forty percent of the import price change, realized over a three-to-five month horizon. In other words: a one-percent rise in import prices leads to an expected zero-point-three to zero-point-four percent rise in core goods CPI over the following quarter, all else equal.

This is not a mechanical formula. Pass-through rates are higher when the dollar is weak (because importers cannot absorb losses from currency moves), when the economy is near full employment (less room to compress margins), and when inflation expectations are already elevated (retailers are more willing to raise prices). Pass-through rates are lower when the dollar is strong, when retailers have pricing power from excess inventory, and when the disruption appears clearly temporary.

For shipping-price analysts, the operating procedure is to watch the ex-petroleum Import Price Index alongside the container freight indices. When both are rising together — container rates up, ex-petroleum import prices up — the signal for future consumer goods inflation is strong. When container rates rise but import prices lag, it suggests importers are absorbing costs in margins, which compresses eventual pass-through. When import prices rise without a freight rate move, it points to currency weakness or foreign producer pricing as the driver, not logistics costs.

Reading an Import Price Release

The BLS publishes the Import and Export Price Indexes report on a fixed schedule — typically the second Thursday of the month following the reference period. The release is one or two pages of tables and a brief text commentary. The structure is consistent across months.

Start with the headline monthly change for all imports. This tells you the direction of the overall import price environment. Then immediately look at the petroleum and ex-petroleum breakdown. If the headline is driven entirely by a petroleum move that tracks with crude oil, the pass-through to consumer prices will be fast (gasoline prices move within two weeks of crude) but bounded. If ex-petroleum is moving, the pass-through will be slower but broader — it will eventually show up across a much wider range of CPI categories.

Next, check the year-over-year change. Import prices are not seasonally adjusted by the BLS, so month-over-month figures carry seasonal noise — particularly in agricultural categories, which have predictable harvest-cycle patterns, and in petroleum, which tends to show seasonal refinery configuration effects. Year-over-year removes most of this noise and gives you the directional trend.

The BLS release also breaks out prices by major end-use category: industrial supplies and materials, capital goods, automotive vehicles, consumer goods, and foods. For maritime shipping analysis, industrial supplies (which include steel, chemicals, and other bulk commodities) and consumer goods (which move primarily in containers) are the two most relevant. Industrial supplies prices reflect bulk freight and commodity markets. Consumer goods prices reflect container freight rates, particularly transpacific routes.

Finally, look at the origin-country detail. The BLS publishes import price changes broken out by country group — China, Canada, Mexico, Japan, European Union, and others. This is useful when a trade dispute, tariff action, or specific regional disruption is in play. Tariffs appear in import price data as discrete step-up moves in prices from the targeted country, which then diffuse gradually into broader import price measures as sourcing patterns shift.

The FRED Series You Need

The following four FRED series cover the core of import price and trade balance analysis. Each links directly to the FRED data page, where you can chart, download, and access the full history.

Limitations and Caveats

The Import Price Index has several limitations that informed analysts hold in mind when working with it.

The most important is that the index measures prices, not costs. It does not separate out the freight component from the foreign producer price component. If a Chinese manufacturer raises the factory-gate price of a product by five percent while simultaneously the ocean freight rate falls by ten percent, the net effect on the Import Price Index might be a decline — yet two entirely different forces are at work. Disaggregating the freight effect from the foreign cost effect requires pairing the Import Price Index with freight rate data from the Baltic Dry Index, the Drewry World Container Index, or proprietary indices like Freightos.

The second limitation is currency. Import prices are measured in dollars, so a strengthening dollar reduces import prices in dollar terms even when foreign prices in local currency are stable. The BLS does not publish an import price index adjusted for currency effects. When you see a large move in import prices, checking the DXY (US Dollar Index) against the same period helps separate currency-driven changes from genuine price-level changes.

Third, the pass-through estimates derived from import prices assume relatively stable distribution margins and retailer behavior. In periods of extreme disruption — the 2021 supply chain crisis, the 2022 energy shock — retailers, wholesalers, and importers all behaved unusually, either absorbing larger-than-normal cost increases or passing through smaller portions than historical regressions would predict. The historical average pass-through rate is a guide, not a constant.

Finally, the Import Price Index covers goods only. The United States imports a significant and growing share of services — financial services, business services, intellectual property — and these do not appear in the import price release. For most shipping-related analysis this is not a binding constraint, since shipping moves goods. But for a complete picture of how foreign prices affect the domestic economy, the Import Price Index is one instrument among several, not a complete account.