Step 4 of 12
Your trade history
The ledger behind your positions: buys, sells, splits — and what Quantic does when it's incomplete.
Movements is your buy/sell history, and it's the authority for any position built from it. Your holdings aren't stored separately — they're recalculated from these trades every time one changes. Delete a trade and the position re-derives itself immediately.
A buy's commission counts towards what the shares cost you, so it raises your average cost — that's how cost basis is defined for tax almost everywhere. A commission on a sale doesn't: it reduces your proceeds, which is a separate calculation, so it's recorded and left alone. Quantic reads commissions out of IBKR statements for you.
Stock splits are a third kind of entry. Record one with its ratio and Quantic rescales your shares and your average cost together, so the position's value doesn't change. No broker export reports splits, so this one is always by hand.
If a position's trades sell more shares than they ever bought, Quantic says so instead of quietly guessing. It usually means a missing earlier purchase, a statement that starts mid-history, or an unrecorded split.
Key terms
- Commission
- What your broker charges to execute a trade. It's small per trade but it's real money, and it counts as part of what the shares cost you — which is why Quantic records the commission on every trade it can read from your statement.
- Stock split
- A company dividing each existing share into several — a 4-for-1 split turns 1 share into 4, each worth a quarter as much. Your position is worth exactly the same before and after; only the number of pieces changes. Dividends per share fall by the same ratio, so your income is unaffected too.
- Reverse split
- The opposite of a split: several shares merged into one, so a 1-for-3 reverse split turns 3 shares into 1 worth three times as much. Value is preserved, but companies often do it to lift a low share price above an exchange's minimum — so it can be worth asking why it happened.
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