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Brand price index

Sumitomo

Starts at 100 in May 2026

Index level
128.1
+28.1% since May 2026
as of October 2026
1 month
+23.4%
3 months
+26.8%
12 months
—

Price barometer

High price
Now · 128.1
Low 100.0 High 128.1

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

What this index is built from

Parts tracked
375
Parts with price history
370
Parts moving the index
272
Monthly price points
2578
Asking prices seen
3449
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.

98 109 120 130 May 2026 Jun 2026 Jul 2026 Aug 2026 Sep 2026 Oct 2026
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
October 2026 128.1 +23.4% 17
September 2026 103.9 +0.3% 53
August 2026 103.5 +2.4% 169
July 2026 101.1 +0.4% 191
June 2026 100.6 +0.6% 205
May 2026 100.0 Start (100) —