Index update
OKN Painting 100 — September 2026
OKN Painting 100 re-bases to 1000.00 for the 3 September 2026 vintage — the first published point under the rebuilt hedonic-v1 valuation model.
September 3, 2026 · Okasen Research
The reading
This is the first published vintage of OKN Painting 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 798.33–1252.61. 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 Any earlier published vintage for this index used the previous model's valuations and is superseded.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
189 hedonic-v1 valuations and 114 trailing-twelve-month sales. Gregoire Boonzaier is the most frequently traded name (16 sales, latest valuation 4,229 USD), followed by Ablade Glover (Ghanaian; 6 sales, 3,915 USD). Jimoh Akolo (22,289 USD) is among the higher-valued constituents. Recent colour: a Deborah Bell sold for 20,000 ZAR and a Larry Scully for 15,000 ZAR at Strauss & Co on 19 August 2026.
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.