On September 10, the U.S. Census Bureau released data on wholesale trade for July: After adjusting for seasonal and trading day effects, wholesalers' sales amounted to $801.3 billion, a month-on-month increase of 0.8% and a year-on-year increase of 13.0%; inventory at the end of the month was $958.9 billion, a month-on-month increase of 1.3% and a year-on-year increase of 5.7%. Although the growth rate of inventory was faster than sales for that month, the inventory-to-sales ratio dropped from 1.28 a year ago to 1.20, indicating that the increase in total inventory did not automatically lead to a buildup of unsold goods.
The wholesale link is situated between producers and retailers, where inventory can either be a precautionary stockpiling by companies confident about future demand or a passive accumulation resulting from unsold goods. To determine which scenario is more realistic, it is necessary to consider sales, the inventory-to-sales ratio, industry structure, and price changes simultaneously. To assert that companies are holding back goods severely just because they have reached a high of $958.9 billion in inventory would ignore the fact that both nominal prices and sales volumes are also subject to change.
Inventory growth is faster than sales on a month-over-month basis, but the year-over-year comparison reveals another aspect.
In July, sales increased by 0.8% month-on-month, with a statistical error range of plus or minus 0.4 percentage points; inventory also increased by 1.3% month-on-month, with an error range of plus or minus 0.2 percentage points. Both changes indicate clear statistical signals. The sales decline in June was revised from an initial 3.0% to 2.9%. Therefore, July represents both a recovery from the decline in sales from the previous month and a continued increase in inventory, and it cannot be simplified to a single direction.
Year-over-year data can better explain why the inventory-to-sales ratio has decreased. Sales have increased by 13.0% compared to the same period last year, which is significantly faster than inventory growth of 5.7%. As a result, the inventory cost per dollar of monthly sales has dropped from $1.28 to $1.20. This ratio is not an accurate prediction that inventory can last for 1.2 months, as there are significant differences in the industry's turnover rates, but it can help compare the buffer capacity of the wholesale system relative to the scale of sales.
The amounts mentioned in the report do not take into account price changes. When prices for energy, metals, agricultural products, and durable goods rise, nominal sales and inventories will increase even if the physical quantity remains unchanged. The Census Bureau clearly states that the data has been adjusted for seasonal and trading day effects, yet it 'has not been adjusted for price changes.' When analyzing actual demand, it is necessary to consider producer prices, import prices, and experimental estimates of actual wholesale volumes, in order to avoid attributing the amount of inflation-induced expansion solely to an increase in the flow of goods.
Industry differences will further diverge. Industries such as automobiles, machinery, and electronics have long inventory cycles, so companies need to stock up in advance for deliveries; non-durable goods like oil and agricultural products experience large price fluctuations, and changes in nominal amounts may mainly come from quotes. A decrease in the overall ratio does not mean that every sub-industry is healthy; similarly, an increase in overall inventory does not mean that all products are unsalable. What companies are truly concerned about are cancellations of orders for their own products, delivery times, and discounted clearance sales.
The impact on growth and interest rates depends on whether the inventory is actively replenished or passively accumulated.
Changes in inventory are included in the calculation of Gross Domestic Product (GDP), but the contribution of GDP is measured by the rate of change in inventory investment, rather than the total amount of inventory itself. If inventory continues to increase, and the rate of increase slows down compared to the previous quarter, it may still drag down growth; conversely, even if sales are average, as long as companies shift from reducing inventory to replenishing it, it could potentially boost GDP in the short term. Therefore, one cannot directly infer the quarterly economic contribution from a single-month growth of 1.3%.
Supply chain managers pay attention to the occupation of cash. An increase in inventory means that more working capital is tied up in warehouses, which is particularly evident when financing costs are high. Simultaneous growth in sales can help mitigate this pressure, but if orders cool down in subsequent months, the proactive stockpiling done now could quickly turn into passive overstocking. Enterprises need to monitor accounts receivable, discount rates, and supplier payment terms, rather than just focusing on the quantity of goods on the shelves.
The import rhythm is also an important variable in explaining inventory levels. Companies may experience a sudden increase in inventory for a month due to earlier arrivals caused by freight rates, tariffs, or supply risks; conversely, they might have to stock up in large quantities the following month due to transportation delays. Such temporal mismatches do not necessarily correspond to changes in final demand. Only by considering wholesale data alongside port throughput, import amounts, and manufacturers' delivery times can one determine whether the increase in inventory results from proactive strategic decisions or from logistical factors.
In addition, 1.20 represents the combined ratio of all wholesale industries. Durable goods typically require longer lead times for inventory preparation, while non-durable goods have faster turnover rates. Changes in the weight of each industry can also affect the overall ratio. Analysts looking to assess discount risks should examine specific categories such as automobiles, machinery, pharmaceuticals, clothing, and petroleum, rather than relying on the overall ratio to draw conclusions about any single company.
For monetary policy, wholesale data is not the core indicator that determines interest rates, but it can provide cross-validation of demand and the supply chain. Strong sales may support the assessment of economic resilience, while sufficient inventory may alleviate price pressures on certain goods. When both occur simultaneously, the policy implications are not one-way, and it is necessary to consider data on consumption, production, employment, and inflation as well.
The next monthly report will also revise the current estimates, and any change after a single decimal point should not be presented as an irreversible trend.
The more cautious conclusion drawn from the July report is that wholesale sales recovered after a decline in June, and inventory grew even faster. However, the inventory-to-sales ratio compared to a year ago has decreased. The next set of data may still be revised, and the nominal amounts will be affected by prices. For the market, what is truly worth tracking is not whether $958.9 billion is too high, but whether sales can continue to absorb inventory, whether the differentiation within the industry is widening, and whether companies have begun to use price cuts to improve turnover.
