How to Read the Oil Report That Moves Markets

Every Wednesday at 10:30 a.m. ET, the Energy Information Administration releases a one-page report on US crude oil and gasoline inventories. Oil traders watch it closely. Oil prices often move within minutes. For most people, the headline is all that matters: inventories went up or down. But the real story—the one that actually explains what happened—sits in the tables underneath.

What the Report Actually Is

The Weekly Petroleum Status Report, or WPSR, lives at the EIA's website. Think of it as a weekly balance sheet for US oil. Like a household budget shows money in and money out, this report shows how much crude oil came into the country, how much refineries processed, and how much left the US as exports. The difference between all that is the "inventory change" — whether stockpiles grew or shrank.

Why the Format Matters More Than You'd Expect

Most people read summaries from news wires. But if you want to understand why inventory numbers moved, you need to look at the actual tables.

The main table — Table 1 — is the workhorse. It shows production, imports, exports, how much oil refineries used, and what was left over. That's the arithmetic that produces the headline number.

Table 4 breaks those same numbers down by region. The US has different oil storage hubs. The Gulf Coast, where most refineries sit, is one region. The Midwest — centered around Cushing, Oklahoma — is another. A big inventory move in one region can mean something completely different from the same move elsewhere. A Gulf Coast buildup might just be the result of fewer oil shipments going overseas. A Midwest buildup might mean refineries aren't running as hard. These details matter to people who trade oil and oil products.

A Real Example: August 2022

On August 3, 2022, the EIA reported that US crude inventories rose when analysts expected them to fall. According to Reuters, the surprise came from two things: US oil exports dropped, and refineries ran at lower rates. Gasoline stockpiles also grew.

The surprise itself mattered — oil prices moved. But the real insight was in the details. A buildup from low exports tells a different story than one from refineries slowing down. The first points to global shipping costs or weak demand abroad. The second points to domestic refining economics. If you confused the two, you'd misread what was really happening.

The Actual Edge

Nothing in this report predicts next week's numbers. But the way the data is structured lets you decompose a surprise. You can see whether exports fell, or refinery demand dropped, or production rose. You can compare region by region.

That decomposition—separating the real signal from the noise—is what matters to professional traders. The headline barrel count is just noise. The details underneath are where understanding actually lives.