PSA publishes how many copies of each card it has graded. We track that number every week, so you can find the cards that are scarce now and are not quietly getting more common.
Find the cards that are scarce now and staying that way.
Worked example · illustrative inputs
Low population and slow growth are different things
100 graded copies → 105 over one year: five added copies, or 5% growth.
A second card going from 20 to 25 copies adds the same five slabs but grows by 25%. Looking at the percentage alone hides the small denominator; looking only at today’s population hides the change.
Compare the population, observation window, growth and evidence together. Low supply does not establish demand or guarantee a higher price.
Illustrative counts over exactly one year. The live screener uses recorded PSA snapshots and marks insufficient or inconsistent evidence. A population report counts graded copies, not every copy in circulation.
Every number in the table is explained below, and each column carries the same explanation on its info icon.
The metrics
What does supply growth mean?
It is how fast the number of graded copies of a card is growing, as a percentage per year. PSA publishes a population report for every card, we save a copy every week, and the growth rate comes from comparing those weekly readings. Low growth means the supply of slabs is staying tight.High growth means people are sending the card in to be graded quickly, so it is getting more common.
Some cards say "no new slabs" instead of a percentage. Why?
Because nothing happened, and saying "0.0% per year" would dress that up as a measurement. If a card has not gained a single graded copy across every report we hold, we say so plainly and tell you how long that has been true.It is usually the most interesting thing on the page: a card with a real population that nobody is grading is genuinely scarce, and staying that way.
And some say "not enough data yet". Why not just show a number?
Because we could work one out and it would not mean anything. Three reasons a card lands here. It has too few graded copies for a percentage to be meaningful, which is most of them: on a card with three copies, one more sends the growth rate past 500% a year.It has too few weekly reports to see a trend. Or PSA’s own figures for it disagree from week to week, which happens and which we will not pass off as market movement. Those cards are hidden by default and counted underneath the table, with the reason next to each one.
What is the gem rate?
The share of all graded copies of a card that came back a PSA 10. A low gem rate means the card is hard to grade well, which is why the 10s that do exist command such a premium over the 9s.We only show it on cards with at least fifty graded copies: below that it is one lucky submission, not a pattern.
Are the 1-year and 5-year projections a price forecast?
No. They carry the current supply trend forward and nothing else: where the population lands if the recent pace simply continues. Prices depend on demand as much as supply, and nothing here predicts demand.
