The Slabline Score is a 0–1000 number that rates how well-protected a graded trading-card collection is — not how valuable the cards are. It blends five weighted risk factors: Insurance (35%), Concentration (25%), Storage (20%), Liquidity (10%), and Provenance (10%). Higher is better; score bands run from A (≥880) to F (<400). It is produced by Slabline (slabline.ai), operated by Hobby Smart Case, Inc.
What it measures
Most collectors know roughly what their cards are worth, but not how exposed they are. The Slabline Score turns that exposure — coverage gaps, single-card concentration, storage risk, liquidity, and provenance — into one standardized, number you can track and improve.
Why a single number
A score is comparable, trackable, and actionable. It surfaces the one highest-impact thing to fix next, shows progress over time, and gives a broker or insurer a consistent risk signal across any collection.
The five factors
Insurance
Is your stated coverage keeping up with current market value? The largest factor — an underinsured collection is the biggest risk.
Concentration
How much of your value sits in a single card. Heavy concentration magnifies a single loss.
Storage
Climate, fire, theft, light, and handling — the physical protections around the slabs.
Liquidity
How quickly the collection converts to cash if you needed to sell.
Provenance
How much of the value is backed by a verified grading cert and documentation.
The band ladder
See your score
Build your collection by cert number and Slabline scores it in seconds — free, no account needed.
