Category price index

Control Systems

Starts at 100 in March 2026

Index level

96.7

-3.3% since March 2026

as of August 2026

1 month: -4.4%
3 months: -0.8%
12 months: —

Price barometer

Good price

Now · 96.7

Low 96.7 High 101.2

Where the index sits between its lowest and highest level so far.

What this index is built from

Parts tracked: 585
Parts with price history: 532
Parts moving the index: 389
Monthly price points: 4720
Asking prices seen: 27979

How to read this index

The level starts at 100. 110 means the parts in this index cost about 10% more than at the start; 95 means about 5% less.

It follows price changes, not price levels: each month it moves by the typical change of the parts that were priced both that month and the month before, so a few very expensive parts never dominate it, and parts coming and going don't move it on their own.

1, 3 and 12 months show the change over that period. The barometer shows where today's level sits between the index's lowest and highest point.

Each month moves by the typical price change of the parts that had a price that month and the month before (the most extreme quarter either way left out). A month with too few changes holds the previous level.

Month by month

Month	Index level	Change	Parts priced
August 2026	96.7	-4.4%	154
July 2026	101.2	+2.8%	253
June 2026	98.4	+1.0%	346
May 2026	97.5	0.0%	563
April 2026	97.5	-2.5%	625
March 2026	100.0	Start (100)	—

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