OKN Sculpture 100 — September 2026

The reading

This is the first published vintage of OKN Sculpture 100 under the rebuilt Track A valuation model (hedonic-v1). It sits at the index's base value, 1000.00, for the 3 September 2026 vintage, with a band of 562.61–1777.43. A base run has no prior vintage and no move to report: the value and activity components equal their base by construction (v-ratio 1.00, a-ratio 1.00).

Why the level reset

The index was re-based when the Track A assessed-value model moved from hedonic-ols-v0.1 to hedonic-v1 — the earlier model memorised single-sale artists and applied one flat FX rate across 2018–2026; v1 uses a partially-pooled artist effect and annual-average FX by sale year. Any earlier published vintage for this index used the previous model's valuations and is superseded. Movement will show from the next monthly valuation vintage on.

What sits behind it

15 hedonic-v1 valuations and 15 trailing-twelve-month sales. The measured names include Benedict Chukwukadibia Enwonwu M.B.E (39,537 USD, 1 recorded sale), Ben Osawe (7,379 USD, 1 sale) and Percy Ndithembile Konqobe (5,946 USD, 1 sale); Anton van Wouw (54,638 USD) carries a valuation but no sale in the window. No transactions in the universe fell in the reporting window; the band is wide (562.61–1777.43) on only 15 valuations.

Method

Blended index, w = 0.5; assessed value (hedonic-v1) and trailing-twelve-month market activity, rebased to 1000 at 3 September 2026. Vintage 3 September 2026.