How the numbers work
CYKI shows two kinds of numbers: the market value of individual pairs, and the CYKI 100 — our index of the sneaker resale market as a whole. This page explains where both come from, in plain language. The short version: real resale marketplace data, snapshotted daily, with honest gaps where the data has gaps.
Where prices come from
When you look at a pair in CYKI, its value is the typical of the last few actual sales in your size — specifically, the median of the last five actual sales recorded for that size (fewer if fewer have happened, and no age cutoff: a size that rarely trades keeps its last real price rather than losing it). We use a median of several sales rather than just the single most recent one because individual sale prices can be one-off outliers — a rushed resale, an off-condition pair, an unusual listing — and a median of the last few ignores a rogue print without the number going stale.
If your exact size hasn't sold recently, we fall back to that size's current lowest asking price. If there's no ask for that size either, we fall back to the product's overall average market price across all sizes. Every value records which of the three it's based on, and the app will soon show that basis on-screen along with when the size last sold.
Dead stock. There's one exception to that last fallback. If a shoe hasn't sold in any size for 60 days, we don't average together a handful of stale asking prices and call it a value — that's dressing up wishes as a market. We show $0, marked "no recent sales," until an actual sale happens somewhere in the shoe again. The moment one does, the value comes right back.
We'd rather show you a hard zero than a number nobody has actually paid. A pair priced this way isn't a claim that your shoes are worthless — it's a statement about the market's silence.
The CYKI 100
The CYKI 100 tracks 100 sneakers chosen to represent the resale market across its main categories — Jordan 1s, Dunks, Yeezys, New Balance, collaborations, and more. The basket is drawn from a wider curated pool of around 150 tracked models, and its composition is versioned so past index values always reflect the basket as it was at the time.
What the numbers are not
- Values are estimates, not quotes. What your pair actually sells for depends on condition, size, timing, platform, and fees.
- Each index constituent is tracked at one reference size. Other sizes of the same shoe can move differently.
- Data is snapshotted daily, so intraday moves are not reflected.
- Marketplace data can be incomplete or delayed; we inherit those gaps.
- None of it is financial or investment advice.
Questions
Spotted something odd, or want more detail on the methodology? Email privacy@canyoukicksit.com.