Summit Score Explained

Summit Score is a single number, 0 to 100, that estimates how much profit a card is likely to generate after grading — adjusted for the cost of getting there. It's our attempt to compress four moving parts into one signal that's actually useful when you're staring at thousands of listings.

This post explains the math, what each input means, and where the score is sharp vs. fuzzy.

What Summit Score actually measures

The score blends four components, each weighted to reflect how much it moves real outcomes for collectors:

• Profit at PSA 10 (25%) — dollar profit after grading + selling fees, assuming a PSA 10.
• Profit % at PSA 10 (25%) — the same profit expressed as a return on raw cost, so a $50 card returning 200% beats a $500 card returning 30%.
• Gem rate at PSA 10 (26%) — the historical share of submissions that actually hit PSA 10. A great PSA 10 economic profile means nothing if only 4% of submissions get there.
• Gem rate at PSA 9+ cumulative (24%) — the safety net. PSA 9 and PSA 10 combined, because a card that lands a PSA 9 instead of PSA 10 isn't a loss for most modern releases.

How the inputs are sourced

Two data feeds power every score:

1. SportsCardsPro (SCP) for raw and graded market prices. We pull and cache nightly.
2. GemRate / PSA pop reports for grading distributions. The pop report is the canonical source for "how often does this card actually grade out at X?"

When either feed is stale or missing data, the corresponding component drops out of the weighted average and we flag the score as partial. A partial score is still useful — it just means one of the four legs is wobbly.

Why we don't use raw dollar profit as the only signal

A high dollar profit on a $500 raw card looks great in isolation. But the probability of actually realizing that profit depends on the gem rate, and the time-to-cash depends on how liquid the graded market is. Summit Score is our way of forcing all of that into one comparable number so you can sort a 500-row search result without losing the nuance.

What a high Summit Score does NOT guarantee

Three honest caveats:

• The PSA 10 gem rate is a lagging indicator. A 2026 release with thin submission data will have a noisy gem rate until high volumes of cards are graded. We bias toward conservatism early, but the noise is real.
• eBay prices move. The score is computed against last night's market values. If something runs 30% in a day, the score won't catch up until the next refresh.
• It's not a buy signal. Summit Score is one factor in a decision. Always check the actual listings, the centering, and the pop trend before pulling the trigger.

How to use it inside Summit

Three places the score shows up:

• Card Details Table on the Search screen — sortable column, color-banded for quick scanning.
• Charts on the same screen — every chart you can build plots profit, gem rate, or cost against score so you can spot the outliers.
• Card detail pages — the breakdown of the four components so you can see why a card scored where it did.

We rev the formula as we learn — every meaningful change shows up here on Pulse.

What's next for the methodology

Two things on our research roadmap:

1. Tiered raw-cost caps that prevent a $5 commons from running away with the score just because its profit % is mathematically huge. Already shipped in the latest version.
2. Set-aware gem-rate priors — when a set has fewer than ~500 graded cards, we want to lean on the brand-level historical gem rate instead of the individual card's noisy population. On the roadmap.

The score will keep evolving. Methodology updates go here.