Plastic Resins and Materials Prices Fall a Fourth Month to 276.3

Plastic Resins and Materials Prices fell for a fourth straight month in September 2026, reaching 276.3, up 6.5% on the year. Illustrative only: if an unchanged plastic resins and materials basket costs $250,000 now and tracks this index exactly, a 6.5% year-over-year move implies $15,258 more than a year ago. This is not a measured purchasing bill.

consecutive declines: 4 months. from 310.0 after May 2026 to 276.3

The run began after May 2026, when the series stood at 310.0 — a slide of 10.9% over the streak.

A run this long changes how the next print reads: a rise would end a 4-month pattern and would be news in its own right, while a fifth consecutive decrease would extend one of the longer streaks in this archive. Source: BLS Producer Price Index.