What Binder tracks for investors
- Cost basis per card, separated by lot if you bought the same card more than once.
- Unrealized P&L per card, per set, and across the binder.
- Realized P&L when you mark a card as sold, with the sale price as the closing leg.
- Time-weighted return that ignores when you added or removed cards from the binder.
Position-level detail
When you tap a card you own, the position view shows you what you paid, what it is worth today, the dollar move, and the percentage move. You also see how the price has trended since your purchase date, which is often a more useful chart than the all-time view. It tells you whether you are on the right side of the position, not just whether the card is moving.
Sealed product
Investors hold sealed product alongside graded singles. Binder treats sealed booster boxes, sealed Elite Trainer Boxes, and sealed packs as their own item type. The pricing universe is thinner. Booster boxes do not transact daily. But the methodology is the same: real recent sales, separated by condition and box variant, with the comp list visible.
Tax and record-keeping
The P&L export is structured for the U.S. collectibles capital gains rate (28%). The format includes acquisition date, sale date, cost basis, gross proceeds, and net P&L per lot. Talk to your accountant. This is not tax advice. But the data is in the format they want to see.
What Binder will not do
No predictions. No buy/sell signals. No "this card is a strong buy." We do not generate trade recommendations and we never will. The honest version of a market app for a hobby market is one that shows you the data clearly and stays out of your trading decisions.