Pillar 4 of 4 · 15%
The Market score
Market reads the live market around the listing: how many retailers corroborate the stone's existence, which way its price is moving, how stable that price has been, and how much money is left on the table.
Cross-retailer verification is the anchor. When five retailers list the same certificate, the stone's existence, grading and market price are corroborated five ways. A single unverified listing scores 30 on this component; six or more corroborations score 100.
Trend and stability come from the listing's own price history, which the platform retains in full. Falling prices score high (a buying opportunity), erratic prices score low (a signal of repricing games or feed noise).
Components and weights
| Component | Weight | Label |
|---|---|---|
| cross-retailer verification | 35 | Cross-retailer verification (35 points): 1 retailer scores 30; 2 scores 65; 3 scores 80; 4 scores 90; 5 scores 95; 6 or more scores 100. Independent listings of the same certificate corroborate that the stone is real and on the market. |
| price trend | 30 | Price trend (30 points): the 30 day price movement of the listing. A drop of 10 percent or more scores 95; drops of 5 to 10 percent score 85; 2 to 5 percent score 75; 0 to 2 percent score 65; flat to plus 2 percent scores 50; rises score progressively lower, to 10 above plus 10 percent. |
| price stability | 20 | Price stability (20 points): the coefficient of variation of the listing's price history. At or below 0.01 scores 100; 0.03 scores 85; 0.05 scores 70; 0.10 scores 50; 0.20 scores 30; above that, 15. |
| savings potential | 15 | Savings potential (15 points): a listing at the cross-retailer minimum (within 1 percent) scores 100; within 5 percent of it scores 80; within 10 percent scores 60; within 20 percent scores 40; beyond that, 20. Stones listed at a single retailer score a neutral 50. |