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Building a Diverse Sports Card Portfolio

What the dashboard does​

Input: Add each card in your collection with its current market value, player name, sport, and era.

Output:

  • Card-level exposure: each card as a % of total portfolio — red alert if over 20%
  • Player-level exposure: all cards per player aggregated — red alert if over 30%
  • Sport-level exposure: basketball vs. football vs. other — red alert if over 50%
  • Era-level exposure: vintage / junk-wax / modern / ultra-modern — red alert if over 60%

Summary dashboard shows:

  • Total portfolio value
  • Current rule compliance status (pass/fail for all four rules)
  • Largest concentration risks ranked by severity
  • Rebalancing suggestions: which positions to reduce and by how much to return to compliance

Scenario modeling tab: Adjust any position's value to model market movements. See how a 60% crash in your largest position affects your overall portfolio health and which rules it breaks.

Designed for portfolios of 20–500 cards. Built for Google Sheets — no subscriptions, no login, no data sharing.

$34. Instant download.