How much should I buy?

You've picked the stocks. Now the hard part — the size of each bet.

Type in the names you like, where you think each one is going in a good year and a bad one, and how sure you are. Out comes how much of each to buy, how much to leave in cash, and the orders to place at your broker. Under the hood: Kelly sizing, a correlation haircut, and a hard per-name cap.

Free, no sign-up. The maths runs in your browser — the numbers you type aren't saved to any account.

Your ideas

Search a ticker — its live price loads automatically. Add your bull / bear targets and conviction p. Names whose two-case edge is negative are flagged and dropped before sizing.

#1
Ticker
NVIDIA Corporation
170.00price unavailable
#2
Ticker
Tencent Holdings Ltd.
420.00price unavailable

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Target portfolio

Portfolio conviction0.83

Sum of raw Kelly fractions before normalization. Low = weak ideas; a cash fallback = too few ideas.

Correlationssector fallback
0/1 pairs from history
Correlations drive the Layer-2 diversification haircut. The figure used is the correlation of overlapping multi-day returns, which keeps cross-market dual listings (an ADR and its local share) from being understated by non-overlapping trading hours; the same-day figure is shown alongside. Names without trusted history fall back to a sector prior.
NVDA
33.0%capped
0700.HK
33.0%capped
Cash (diversification limit)
34.0%

Notes

  • Only 2 eligible names — each capped at 33%, 34.0% held as cash (diversification limit).

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