Will Wemby Rookies do Jordan Numbers?
What gem rate actually measures
Gem rate is the percentage of all graded copies of a given card that receive the highest grade — PSA 10 (or BGS 9.5 Black Label equivalent). It is one of the most useful single numbers in evaluating a card's scarcity profile, and most collectors either don't know it or don't apply it correctly.
Here is the core principle: a PSA 10 is only as scarce as the gem rate makes it.
If 64% of Wembanyama's 2023 Prizm Silver copies achieve PSA 10, then a PSA 10 is essentially the standard result of submitting a well-kept copy. It is not scarce. It is expected.
If 2.24% of Jordan's 1988 Fleer copies achieve PSA 10, then a PSA 10 represents an extraordinary outcome. Out of every 100 copies submitted, only 2 receive the top grade. That is genuine condition scarcity.
The numbers side by side
| Wembanyama 2023 Prizm Silver | Jordan 1988-89 Fleer | |
|---|---|---|
| Total PSA graded | ~12,000 | ~18,400 |
| PSA 10 copies | ~7,680 | ~413 |
| Gem rate | ~64% | ~2.24% |
| PSA 10 price | ~$380 | ~$4,800 |
The Jordan has a PSA 10 that is roughly 18x more expensive than the Wembanyama, and the condition rarity explains a significant portion of that premium. Even setting aside player legacy and era, there are simply far fewer Jordan PSA 10s available relative to the demand for them.
What this means for the risk profile
Modern ultra-chrome cards (Prizm, Chrome, Optic) grade easily. The manufacturing precision of current Fanatics/Panini product — consistent centering tolerances, surface protection, quality control — means that well-kept raw copies routinely grade PSA 10. This is great for collectors who want clean product. It means condition scarcity is not a significant driver of value for modern PSA 10s. The value driver is the player, the narrative, and the production print run.
Vintage cards grade hard. The variables that made 1988-89 Fleer production condition-sensitive — paper stock, printing tolerances, wax pack staining, 35+ years of circulation — cannot be replicated. Every PSA 10 Jordan from 1988 exists because a specific physical card survived specific circumstances. That is non-reproducible scarcity.
This does not make modern cards worse investments. It makes them different investments with different risk drivers. A Wembanyama Prizm PSA 10's value will be driven almost entirely by Wembanyama's career performance, not by supply constraints. If he becomes a generational all-time player, the card's value climbs. If his career disappoints, 7,680 PSA 10s seeking fewer buyers is a supply problem.
A Jordan 1988 Fleer PSA 10's value is already anchored by fixed supply, confirmed cultural legacy, and 35 years of appreciation history. The downside scenarios are narrower.
The practical framework
When evaluating any card purchase, ask two questions before checking the player:
- What is the gem rate?
- What is the total PSA 10 population?
A gem rate above 30% means the PSA 10 is abundant. The card's value is a pure player bet. A gem rate below 5% means condition scarcity is a structural floor in the valuation. You are buying both the player and the rarity.
Neither is inherently better — they just require different investment theses. Know which one you're making.