Card prices move for a small number of reasons, and knowing them stops you panic-selling or panic-buying.
Real drivers
- Reprints. A card reprinted in a new set almost always drops the older printing, sometimes sharply.
- Format and rules changes. In games with active play, a rules change can multiply or destroy a card's value in a day.
- Media and nostalgia. An anniversary, a film, or a well-known personality opening packs on stream moves prices for weeks.
- Grading population. When a lot of PSA 10s of a card enter the market, the premium falls.
- Set rotation and supply. As sealed product dries up, singles from that set drift up.
Movements that are not real
- One odd sale. On thinly traded cards a single unusual sale drags an average. The 30-day figure is more honest than the latest sale.
- Currency. A price quoted in another currency moves with FX without the card changing at all. We convert at a fixed, periodically reviewed rate rather than live spot, precisely so values do not twitch with the currency market — see how our price data works.
- Asking prices. Someone listing a card at triple market has not moved the market.
Watching it deliberately
If you track your collection here, price moves are surfaced against thresholds you set — a minimum percentage swing, a minimum card value, and a 7 or 30-day window. That stops the noise of pennies moving on bulk cards, and leaves the movements you would actually act on. The movers guide explains the rule.