Quantic for long-term investors
A trade ledger that survives splits, spin-offs and a change of broker — and never locks your data in.
Hold something for fifteen years and the hard part stops being analysis. It becomes record-keeping: what did you actually pay, across three brokers, two currencies, a stock split and a spin-off nobody explained at the time.
Quantic keeps every buy and sell as a ledger entry, and your holdings are recomputed from it rather than stored separately — so re-importing the same statement changes nothing, and a correction to an old trade flows through everything downstream. Fees go into the cost basis. Splits adjust the history. A spin-off moves cost as well as shares, in the proportion the company published. Sell out and the position doesn't vanish: it becomes a closed position with what the sale came to, how long you held it and what it paid you along the way. Import from IBKR, MyInvestor or DivTracker directly, from any other broker by mapping its columns once, or by hand.
Realized results use average cost, not FIFO, and are never converted between currencies — a euro gain and a dollar gain are reported separately rather than added up. That is deliberate: it is a performance read, not a tax calculation. Quantic also has no total-return or benchmark figure yet, so it will not tell you how you did against an index.
How to start
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1
Import your broker's trade statement — if it isn't recognised, map its columns once and Quantic remembers.
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2
Review the incomplete-position warnings, which flag holdings whose history starts mid-story.
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3
Export everything to CSV or a JSON backup whenever you like — there is no lock-in.
Key terms
- Cost basis (average cost)
- What you actually paid for the shares you hold, per share — the money you put in, including the commission, spread across your shares. Buying more at a different price moves it; selling doesn't, because selling doesn't change what the shares you kept cost you. It's the baseline your gain, your yield on cost and any future tax calculation are measured against.
- Realized result
- What a sale actually came to: what you received for the shares, less the commission, less what those shares had cost you. It's called a result rather than a gain because it is just as often negative — selling below your average cost is an ordinary part of investing, not a mistake to hide. Until you sell, a position's rise or fall is unrealized: real on paper, but nothing has happened yet.
- 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.
- Spin-off
- A company handing its shareholders shares in a business it is separating out — you wake up owning two companies instead of one, without buying anything. Your original share count doesn't change, but part of what you paid for it now belongs to the new company: the two split the cost basis in proportion to what each was worth on the day. The company publishes that split (often as "Form 8937"), and it matters, because whatever isn't allocated to the new shares shows up as pure gain when you sell them.
- 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.
Quantic · Free
Try it with your own portfolio
Every guide above describes the free tier. Create an account and import your broker statement, or explore a sample portfolio first — no signup needed.
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