Market Heatmap Trends
As of Wednesday, April 22, 2026 at 6:13 AM.
What is the CardPromoter Market Heatmap? The Market Heatmap is a daily snapshot of live sports card marketplace activity showing which player markets are heating up or cooling down based on price movement and listing trends. Heat Score is a 0–100 rating that summarizes combined price change, total listings change, and new listing activity.
Top gainers highlight players driving prices higher with stable inventory, inventory spikes capture listings growing 30%+ above their 7-day pace, supply squeezes track double-digit drops in active listings, and decliners flag players with falling prices and rising supply.
Babe Ruth Heat Check
Heat Score: 90
Price: +23.8%
Listings: +1.3%
New Listings: +36.9%
Top Gainers
- Babe Ruth — +23.8% • Listings +1.3%
- Ken Griffey Jr — +42.8% • Listings +0.3%
- Rickey Henderson — +21.6% • Listings -0.6%
- C. J. Stroud — +33.3% • Listings -2.7%
- Josh Allen — +24.6% • Listings +0.3%
Inventory Spikes
- Babe Ruth — New +36.9% • Price +23.8%
- Ken Griffey Jr — New +37.8% • Price +42.8%
- Elly De La Cruz — New +33.3% • Price +16.7%
- Sandy Koufax — New +33.6% • Price -2.8%
- Jayson Tatum — New +40.0% • Price -4.2%
Top Decliners
- Sandy Koufax — -2.8% • Listings +2.4%
- Jayson Tatum — -4.2% • Listings +2.0%
- Bobby Witt Jr. — -6.7% • Listings +1.8%
- Walter Payton — -1.0% • Listings +0.7%
- Drake Maye — -0.1% • Listings +2.2%
Heat Check: Babe Ruth posts a heat score of 90 with price at +23.8% and listings +1.3% versus yesterday.
Top gainer: Babe Ruth is up +23.8% with listings +1.3%.
Top decliner: Sandy Koufax slides -2.8% while listings move +2.4%.
View the interactive heatmap →
How often is the Market Heatmap updated?
The snapshot refreshes daily with the most recent marketplace data, and the summary text updates automatically within minutes.
Does the heatmap track auctions or fixed-price listings?
It monitors both auctions and Buy It Now cards sourced from trusted marketplaces, weighting signals by price change and supply shifts.
What goes into the Heat Score calculation?
Heat Score blends short-term price movement, total listings change, and new inventory spikes to produce a 0–100 reading for each player.