5つの要素
スコアは、重み付けされた5つのリスク要素を組み合わせたものです。それぞれ、コレクションが価値を失ったり、回収が難しくなったりする異なる側面を測定します：
重み付けの仕組み
保険（35%）：現在の市場価値に対する補償。保険でカバーされている額と、今日のカードの価値との差を示します。
集中度（25%）：単一の選手・セット・カードへの偏り。80%が同じ新人選手というコレクションは脆弱です。
保管（20%）：気候・火災・盗難・光・取り扱いに対する保護。
流動性（10%）：カードが適正価格でどれだけ簡単に現金化できるか。
来歴（10%）：書類、グレーディングの来歴、購入記録。
バンド
スコアはA（≥880）、B（≥750）、C（≥600）、D（≥400）、F（<400）に分かれます。高いほど良好です。ほとんどのコレクションは保険が不足しているためC〜Dの範囲から始まります。まさにSlablineが埋めるために作られた差です。
自分のスコアを無料で作成できます（最大25枚）。ラベルをスキャンして数枚追加すると、Slablineが実際の取引相場から各カードを評価します。
Storage (20%) — the physical risk
Storage scores the boring failures that destroy more value than any market crash: heat and humidity that warp slabs and fog holders over time, fire, theft, prolonged light that fades ink, and simple handling damage. A slab is more durable than a raw card, but it is not indestructible, and the grade on the label means nothing if the asset is gone.
A strong Storage score looks like a safe or a safe-deposit box, climate stability, protection from direct light, and — for the crown jewels — off-site or third-party vaulting that separates your highest-value pieces from a single-location catastrophe. The goal is simple: no single event in one room should be able to wipe out the collection.
Liquidity (10%) — can you actually sell at fair value
Liquidity measures how readily your holdings convert to cash near their market value. A blue-chip PSA 10 modern rookie sells in days at a price you can predict within a few percent. An obscure slab in a thin market can sit for months, or only move at a real discount to its "value." The number on the screen is only worth what a buyer will actually pay this week.
This factor matters most at exactly the wrong time — when you need cash, are settling an estate, or want to rebalance away from a concentrated position. A collection weighted toward liquid, widely traded cards scores higher because it can be turned into money without a fire sale.
Provenance (10%) — the paper trail
Provenance scores your documentation: verified certification numbers, grading pedigree, and purchase records. It is the lightest weight of the five, but it quietly underwrites the other four. A clean paper trail speeds an insurance claim, defends authenticity at resale, supports premiums for well-pedigreed copies, and makes a collection far easier to value and transfer.
A strong Provenance score means your certs are verified against the grader, your receipts and acquisition history are kept, and ownership is documented well enough that you — or your heirs — could prove what you have and what it cost.
The bands — what A through F mean
The 0–1000 score maps to five letter bands, so you can read your standing at a glance:
A (≥880) — well-protected. Insured to live value, diversified, securely stored, and documented. Genuinely rare.
B (≥750) — solid, with minor gaps worth tidying.
C (≥600) — typical. A real, identifiable gap, almost always insurance or concentration.
D (≥400) — exposed. A loss event would be financially painful and only partly recoverable.
F (<400) — critical. The collection is essentially unprotected; one bad day could erase most of it.
Most collections start in the C–D range, and the reason is almost always the same: they are under-insured. That is not a personal failing — the hobby has simply never had a tool that put a number on it. Closing that one gap is usually the single fastest way to move up a full band.
How to raise your score
Work the factors in order of weight, because that is where the points are. Start with Insurance: pull a broker-ready schedule and size your coverage to current market value. Next, look at Concentration — if one name or set dominates, future buys are a chance to broaden rather than double down. Then Storage: a safe, climate stability, and off-site vaulting for the top pieces. Liquidity and Provenance are lighter, but verifying certs and keeping records is nearly free and pays off the moment you ever need to file a claim or sell.
The Score is live, so each of these actions moves the number as you take it — which turns an abstract worry into a concrete, improvable metric.
What the Slabline Score is not
It is not a grade of card quality. A PSA 10 Charizard can sit inside an F-rated collection if it is uninsured and stored badly; a thoughtful, fully covered collection of mid-grade cards can score an A. The Score rates protection, not greatness.
It is also not an appraisal, an insurance policy, or a prediction of future price. Slabline is not an insurer or a broker. The Score is an informational protection score built to show you where you are exposed and what to do about it — the values behind it are estimates from recent comparable sales, not a certified appraisal or financial advice.
How Slabline calculates it
Every slab in your collection is valued from real comparable sales — recent transactions of the same card and grade aggregated across the major marketplaces — so the Score is anchored to what the market is actually paying, not a static price-guide figure. Slabline then scores each of the five factors against those live values, applies the weights, and sums to a single 0–1000 number. As values move and as you add coverage or storage details, the Score updates with them.
You can read the full approach on the methodology page — including how comparable sales are selected and how each factor is measured.
Build your score free
You can build your own Slabline Score free for up to 25 cards. Add a few slabs by scanning the certification label — Slabline reads the cert, values the card from real comparable sales, and computes your Score across all five factors in seconds. From there you get a broker-ready insurance schedule and a clear, prioritized path to a better number.
