PWCC Vintage
Market Indices

The following are key inputs to PWCC Index creation:

1. Only auction sales are included. Private or buy-it-now retail sales are omitted as they don’t represent a true gauge of a supply and demand open marketplace.
2. All data is comprised entirely of PSA-graded cards because they represent 80% of the market population for graded trading cards and thereby afford the greatest number of apples-to-apples market sale comparisons.
3. Only grades PSA 4 and up were considered across all years.
4. All data is limited to years earlier than 2000; as such, much of the modern card market is currently not represented. Expansion into years 2000 and later will be addressed in the coming months.
5. A trade frequency requirement is applied to all possible trading cards and must be satisfied for inclusion in the PWCC Indices; any card which has sold a minimum of 10 times in the last 10 years and at least 2 times in the last 12 months is eligible.
6. An outlier algorithm is triggered if a recent sale widely over/under performs current market averages; subsequent sales will either confirm or deny the flagged sale as being valid for inclusion in the index or omitted as an outlier.
7. Those sales which satisfy both the trade frequency and outlier filters are sorted by average market sales price, which is calculated to be the average of the last three auction sales, and then segmented into the various PWCC Indices; PWCC 100 therefore represents the 100 cards with the highest average market value, the PWCC 500 represents the 500 cards with the highest average market value, etc.

Additional notes:

1. The PWCC indices are dynamic, meaning certain cards will be included and omitted from the indices in compliance with the stated trade frequency requirement.
2. The PWCC Indices ARE NOT intended to be read as a universal gauge of the market since cards 2000-2017 are not represented. Similarly, countless immeasurably important cards which don’t meet the trade frequency requirement are not included due to their inherent rarity (i.e. T206 Honus Wagner) and cards in high grades which are low population (i.e. 1952 Topps Mickey Mantle in grades higher than PSA 8) are not included.
3. The outlier algorithm flags any recent sale with a hammer price that varies more than 50% from the previously validated hammer price (higher or lower). When this occurs, the subsequent sale will either validate or invalidate the flagged sale; if the subsequent sale is within 30% of the flagged sale (higher or lower) both sales are validated; otherwise the prior sale is labeled an outlier and omitted from the dataset. It is important to note that quality and corresponding price for a given card in a single grade can vary widely; our PWCC Certified High End designation is designed to highlight cards of superior quality and often times these cards sell for premiums which our software flags as outliers. While record prices for High End cards are certainly valid sales, they don’t always represent the predictable market to investors, which is a primary goal of the indices.
4. We encourage all users of this tool to forward constructive feedback to cs@pwccmarketplace.com.