The CollectORbuild LEGO Index
One number for the whole LEGO market: a value-weighted index of the secondary-market value of the sets we track, set to 100 at the start and moving as prices do.
CollectORbuild LEGO Index121.1 ▲ +21.1 (+21%)
Apr 2Jul 29
Since April 2, 2026, the LEGO market is up 21%, across 4,824 tracked sets.
How it’s built
- Value-weighted: bigger-value sets move the index more, so it reflects where the money is.
- Chained on the sets common to consecutive days, so a set joining the tracked list doesn’t jolt the index.
- Based on blended secondary-market new/sealed values, not CollectORbuild seller prices. Not investment advice.
See the sets driving it in the biggest appreciators and biggest depreciators.