Inventory Spike Alerts — New Sports Card Listings Rising
Card Promoter’s Market Heatmap identifies short-term momentum in the sports card market by analyzing price changes, listing volume shifts, and new inventory activity across active players. Each athlete receives a Heat Score representing current market activity based on these signals.
Inventory spikes occur when a large number of new listings enter the market. This can indicate selling pressure or increased trading activity.
Inventory Spike Alerts
| Player | New Inventory | Price Change | Heat Score |
|---|---|---|---|
| Kobe Bryant | +51.1% | -7.5% | 46 |
| Babe Ruth | +35.9% | +0.0% | 63 |
| Aaron Judge | +25.4% | +0.0% | 48 |
| Roman Anthony | +25.4% | +13.8% | 66 |
| Drake Maye | +18.8% | -6.7% | 45 |
| Walter Payton | +14.0% | +3.6% | 54 |
| Justin Herbert | +12.0% | +42.9% | 72 |
Featured players: Chet Holmgren, Bobby Witt Jr., Trevor Lawrence