The HPG Index · Updated daily
How big is the High Population Grade coin market?
The total of the lowest current dealer ask for each certified coin, multiplied by how many of that coin exist in that grade. One honest number for a market that never had one.
An asset class like no other
HPG coins are fungible enough to price, rare enough to keep a premium. When tens of thousands of the same coin exist in the same certified grade, any one is a stand-in for any other — so a single price, and a market cap, finally mean something.
Certified & interchangeable
10,000+ examples graded by PCGS or NGC at the same grade. Not rare — and that's the point. Sameness is what makes a price knowable.
Priced like a commodity
A metal floor underneath, a published population on top. The lowest dealer ask becomes a quote the way a spot price does.
Still a collectible
Design, history, condition, and the grade keep a premium over melt. Fungible enough to trade on a number; never just bullion.
Why this site exists
ColCur started as an attempt to build “a stock market for coins.” As a business, that didn't work. But it surfaced something real: a whole tier of certified coins that behave like an asset class nobody had named, and a gap underneath it — the coins too cheap or too plain to bother slabbing. That gap became CabinetGrade, the grading business this index now quietly serves. This page is the honest record of how we got here.
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