What each measure covers, why it matters, and what it is not

What the measure covers. WPU0811 is the BLS producer price index for softwood lumber: what sawmills receive for dimension lumber, boards and timbers as they leave the mill, in index form with 1982 = 100, not seasonally adjusted. BLS builds it from lumber not edge worked and from softwood lumber made from purchased lumber, cut stock and dimension.

Why it matters. Framing is the largest single material line in most wood-frame residential work, and lumber is the most volatile of the six groups: within the past five years the index has risen and fallen by more than half within a year or two. A lumber claim needs a date attached to it more than any other.

What it is not. Not plywood, OSB, engineered wood, trusses or pressure-treated lumber, which BLS indexes separately. Not a delivered yard price, which adds freight, handling and dealer margin and moves on its own timing. Not a regional price; the index is national. A year-over-year figure for lumber can be large in either direction because the comparison month was itself unusual; the chart shows which.

What the measure covers. WPU10260314 is the BLS producer price index for copper wire and cable: what producers receive for building wire, power cable and similar manufactured products as they leave the plant, in index form with December 1986 = 100, not seasonally adjusted. Beside it, the edition reads the World Bank's monthly average of the LME copper settlement price (grade A cathode, U.S. dollars per metric ton), which is the raw metal.

Why it matters. Electrical work is priced largely on copper, and the raw metal is what moves in the news. The pair lets a reader see whether wire and cable followed the metal, lagged it, or moved by less, which is the usual pattern because fabrication, insulation and distribution costs sit between the two.

What it is not. The index is not copper plumbing tube, fittings, roofing copper or scrap. The LME price is a world benchmark in dollars per ton, not a U.S. delivered price, and it includes no fabrication. The gap between the two year-over-year figures is an observation about two series; it is not a margin, a markup or anyone's cost.

What the measure covers. WPU1017 is the BLS producer price index for steel mill products: what mills receive for sheet, plate, bars, structural shapes, pipe and tube and semifinished steel as they leave the mill, in index form with 1982 = 100, not seasonally adjusted. It is a broad group that BLS subdivides by product and by carbon, alloy and stainless grade.

Why it matters. Structural steel, rebar, decking, studs and pipe all begin as mill products, and mill pricing responds quickly to trade policy, energy costs and demand. Steel claims often cite a headline about tariffs; the index shows what mill prices did over the same months.

What it is not. Not fabricated or erected steel, not rebar installed, not hardware or fasteners, and not any one product: sheet and structural shapes can move differently within the group. Not a delivered price. The index does not say which product drove a month's change.

What the measure covers. WPU102501 is the BLS producer price index for aluminum mill shapes: what producers receive for sheet, plate, foil, extruded shapes and similar semifinished aluminum as it leaves the mill, in index form with 1982 = 100, not seasonally adjusted. Beside it, the edition reads the World Bank's monthly average of the LME aluminum settlement price (high-grade primary ingot, U.S. dollars per metric ton), the raw metal.

Why it matters. Windows, storefront, curtain wall, gutters, siding, flashing and much electrical and mechanical hardware are made from mill shapes. As with copper, the pair shows whether the manufactured product tracked the metal or moved on its own.

What it is not. Not finished products such as windows, doors or siding, which carry fabrication, glass, hardware and labor. The LME price is a world benchmark and not a U.S. delivered price; the regional premium that U.S. buyers pay above the LME price is not in either series. A gap between the two is not a cost.

What the measure covers. WPU137 is the BLS producer price index for gypsum products: wallboard and other gypsum building materials plus other gypsum products, in index form with 1982 = 100, not seasonally adjusted. Beside it, the edition reads WPU13710102, gypsum building materials (December 1993 = 100), the narrower index in which wallboard sits.

Why it matters. Drywall is in nearly every interior, and the index tends to hold within a narrow range for months and then move by several percent in one step, so a quiet stretch is not a guarantee about the next month.

What it is not. Neither index is the price of any one wallboard product, thickness or type, and neither includes installation, finishing or delivery. A broad gypsum-products index is not labeled here as the price of drywall. The two indexes have different base periods, so their levels are not comparable; their changes are.

What the measure covers. WPU1333 is the BLS producer price index for ready-mix concrete: what producers receive for concrete delivered from the plant, in index form with 1982 = 100, not seasonally adjusted. Beside it, the edition reads WPU1322, cement (hydraulic), the priced input, and the U.S. Geological Survey's monthly survey of portland and blended cement shipments from U.S. plants, in metric tons.

Why it matters. Foundations, slabs, sitework and most public work are priced on concrete, and the input and the product can move apart: aggregates, delivery, fuel and local plant competition sit between cement and a delivered yard of concrete. Cement shipments show whether the market behind a price move was busy or slack, several months after the fact.

What it is not. Cement is an input to concrete, not another name for it; the two indexes are kept apart. The concrete index is national; BLS also publishes regional ready-mix indexes, which are not read here. Not precast, block, aggregates or placement. Shipments are a volume, not a price, and USGS publishes them about four to five months after the month they describe, so they never describe the same month as the latest index value.