From Jan 2017 to Sep 2026 the index went from 210.7 to 311.2, a change of +47.7%.
Highest reading in that period: 319.1 in Jul 2026. Lowest: 210.7 in Jan 2017.
Largest one-month rise: +5.1% in Apr 2026. Largest one-month fall: -2.1% in Aug 2026.
For a clause that resets its base every year, a 10% cap or floor would have limited the adjustment in 5 of the last 36 months.
Use it in a contract
Draft clause citing this series
A starting point citing this series by name and code. Replace the bracketed terms with your contract's actual scope before use.
The [affected portion] of the Contract Price shall be adjusted using US PPI — Unsupported Plastic Film, Sheet, and Other Shapes (BLS series WPU0722), published by BLS.
Base Period: the index value published for September 2026 (or the month of contract signing, if different) is the Base Value.
Adjustment: at each Adjustment Date, the Current Value is the most recently published three-month average of the index (the Averaging Window). The Escalation Factor equals Current Value divided by Base Value.
Cap: the Escalation Factor applied under this clause shall not exceed 1.10 or fall below 0.90 (a 10% cap and floor) in any single Adjustment Date, regardless of the index's actual movement.
[Replace bracketed terms with your contract's actual affected-portion definition and adjustment-date schedule before use. This is a drafting starting point, not legal advice.]
Covers flexible packaging film and sheet stock as a commodity, common in a freight or product-packaging escalation composite where film cost is a real, separately negotiated line.
Divide the current value of BLS series WPU066 (Plastic Resins and Materials) by its value at contract signing, then apply that ratio to the resin part of the price. BLS also publishes thermoplastic, thermosetting and finished plastic products series, so naming the exact one matters more than usual.
Let Escalake run this clause for you
Escalake tracks US PPI — Unsupported Plastic Film, Sheet, and Other Shapes, applies your formula, and gives both sides a number they can confirm, no spreadsheet required.