PHASMA Cards
Valuation methodology
The exact algorithm behind every fair value, index level and market cap on PHASMA Cards — recency decay, liquidity weighting and the roll-up formulas, each linked to the live data it produces.
Read the methodology, then explore the data.
PHASMA Cards publishes the math behind every number. Fair values, market caps and indices are built from transparent, documented calculations over sourced sales — no black boxes, no proprietary adjustments you cannot audit.
- Recency half-life
- 90.0d
- Liquidity reference
- 3 sales
- Liquidity window
- 180 days
- 01
Sourced sales
Every graded sale is captured with its venue, date and grade so a price can always be traced back to a real transaction. Raw sales are the only input to the algorithm — nothing is seeded.
Input: the sourced sales ledger
Open the sales ledger - 02
Fair value
Each sale is weighted by recency and liquidity, then combined into one fair value per card and grade. Recency halves every 90.0d (recencyWeight = 0.5 ^ (ageDays / halfLifeDays)); liquidity scales with the count of sales inside a 180-day window, reaching full weight at 3 recent sales.
fairValue = round( Σ(price × recency × liquidity) / Σ(recency × liquidity) )
Audit a card's fair value - 03
Indices & caps
Card-level fair values roll up into set indices and market caps. Each constituent contributes fair value × graded population, and the index level is the population-weighted mean of those values — so a single card and the whole market are directly comparable.
contribution = fairValue × gradedPopulation
Trace the indices