From Jan 2017 to Sep 2026 the index went from 162.4 to 236.2, a change of +45.4%.
Highest reading in that period: 236.9 in Jan 2025. Lowest: 162.4 in Jan 2017.
Largest one-month rise: +7.6% in Jan 2025. Largest one-month fall: -4.1% in Dec 2019.
For a clause that resets its base every year, a 10% cap or floor would have limited the adjustment in 3 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 — Titanium and Titanium-Base Alloy Mill Shapes (BLS series WPU102505), 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.]
The standard series for titanium stock used in aerospace structural and engine components, priced separately from the aluminum and steel series it sometimes substitutes for.
New aircraft are escalated with a labor and inflation formula, not a manufacturing PPI: 65% Employment Cost Index (manufacturing, CIU2013000000000I) plus 35% CPI-U (CUUR0000SA0), measured against base-year values and applied at delivery. Spare parts have no series built for them, so price them from a weighted input composite instead.
Let Escalake run this clause for you
Escalake tracks US PPI — Titanium and Titanium-Base Alloy Mill Shapes, applies your formula, and gives both sides a number they can confirm, no spreadsheet required.