How to Read a PSA Population Report
Pop reports are the closest thing the hobby has to a supply chart. Here's how to actually use one.
Updated 2026 · Gem Gains
A PSA population report is a running count of how many copies of a card PSA has graded at each grade. Think of it as a supply census: the more copies exist in a grade, the less scarce that slab is. Read alongside price, pop data tells you whether a card is getting rarer or more common in the grade you care about.
The numbers that matter
For each card you'll see a count at every grade — how many 8s, 9s, 10s, and so on. Two figures matter most for value:
- PSA 10 population — the raw scarcity of the top grade. A low PSA 10 pop on a popular player is a bullish signal.
- Gem rate — the percentage of all graded copies that came back as 10s. A low gem rate means 10s are hard to earn, which supports a higher PSA 10 premium.
How pop data moves value
Scarcity and demand set price together. A card with a tiny PSA 10 pop but no collector interest won't command a premium. But a sought-after rookie with a low gem rate and a small 10 pop can carry a large raw-to-PSA-10 spread — exactly the setup graders look for.
Watch the trend, not just the snapshot. Pop counts only grow. If a card's PSA 10 pop is climbing fast, future supply is rising, which can pressure prices even if the card looks scarce today.
Pop plus price = a grading decision
Pop data answers "how scarce?" Price answers "worth how much?" You need both. Gem Gains pairs live pricing with grading spreads so you can turn population context into a clear grade-or-skip call. See this week's best cards to grade →