Vault 10 Capital

Guide

PSA gem rate, and why scarcity follows from it

The gem rate is the single most durable number in graded Pokemon cards. It tells you how quickly the PSA 10 supply of a card can grow — and supply growth, not hype, is what eventually decides whether a top-grade card holds its value.

What a gem rate actually is

A card’s PSA gem rate is the share of all its graded submissions that came back a PSA 10:

gem rate = PSA 10 population ÷ total graded population × 100

Both figures come from PSA’s public population report for the exact card and version. If 4,000 copies have been graded and 600 are PSA 10s, the gem rate is 15%. Nothing is modelled — it is a count divided by a count, updated as PSA grades more copies.

Why a low gem rate creates structural scarcity

Think of the gem rate as the yield of a factory. At a 12% gem rate, roughly eight raw copies have to be submitted to manufacture one new PSA 10. At a 70% gem rate, three submissions produce two. Same collector demand, wildly different rate of new supply.

That is why this is a structural edge rather than a narrative one. Hype fades, characters go in and out of fashion, sets get reprinted — but the physical reasons a card grades badly (centering, print lines, holo scratching, edge wear on a dark border) do not change. A card that has been hard to grade for five years will still be hard to grade next year, and its top-grade float stays tight.

Submissions needed per new PSA 10

10% gem rate
10.0 submissions
20% gem rate
5.0 submissions
30% gem rate
3.3 submissions
50% gem rate
2.0 submissions
70% gem rate
1.4 submissions

Our screen rejects anything above a 30% gem rate, and separately rejects cards whose PSA 10 count is already expanding quickly — because a good ratio says nothing about whether a grading wave is happening right now.

Gem rate alone is not the trade

A low gem rate on a card nobody grades is meaningless. We pair it with a graded population of at least 50 copies, so there is an honest market rather than three sales inventing a price, and with recorded PSA 10 sales volume so a position can actually be exited. High population and low gem rate is the combination that matters: plenty of people have tried, and few succeeded.

Live examples: high population, low gem rate

Cards in the vault, sorted by gem rate. Every figure is read from PSA’s population report; public data runs seven days behind the member edition.

Common questions

What is a PSA gem rate?

A PSA gem rate is the share of all submissions of a card that PSA has graded a 10. If 4,000 copies have been graded and 600 of them came back PSA 10, the gem rate is 15%. PSA publishes the full population report for every card, so the figure is observable rather than estimated.

How do you calculate a gem rate?

Divide the PSA 10 population by the total graded population and multiply by 100. Both numbers come from PSA's public population report for that exact card and version.

What is a good gem rate for investing?

We treat 30% or lower as the threshold. Below that, most submissions fail to reach a 10, so the top-grade float grows slowly even as more raw copies are sent in. Above roughly 50%, PSA 10 supply expands almost as fast as submissions, which caps the price.

Why does a low gem rate make a card scarce?

Gem rate is a supply mechanic, not a hype signal. A card that gems 12% of the time needs eight submissions to produce a single PSA 10, so the number of PSA 10s in the world climbs slowly and predictably. A card that gems 70% of the time can flood its own top-grade market in a single grading wave.

Is a low gem rate enough on its own?

No. A card that is hard to grade but never trades has a price on paper only. Gem rate has to be paired with a real graded population, recorded PSA 10 sales volume, and a PSA 10 float that is not growing quickly.

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