Investing term
What is Core-and-satellite?
A portfolio structure where most of your money sits in a 'core' diversified base, with smaller 'satellite' bets around the edges.
Core-and-satellite is a portfolio structure where the bulk of your money sits in a diversified, low-cost 'core' — usually broad index funds — while small 'satellite' positions take more active or concentrated bets around the edges. The core does the heavy lifting; the satellites add a little spice.
It's a way to scratch the stock-picking or theme-chasing itch without risking your whole plan. The large core keeps you anchored to broad market returns and low costs, so even if a satellite bet goes badly, the damage is capped at that small slice. It's a structured compromise between the discipline of passive indexing and the desire to back a conviction — as long as the satellites stay genuinely small.
Most of the money sits in a diversified, low-cost core; small satellite bets add conviction around the edges. You can back a view without risking the whole portfolio — if satellites stay small.
For example
You keep 85% in broad index funds (the core) and split 15% across two or three high-conviction picks (the satellites) — your bets matter, but can't sink the portfolio.
Learn it by doing
That's Core-and-satellite in theory — it clicks when you use it. Practise it hands-on in a free, interactive lesson (Stage 10, Building Your First Portfolio).
Try the free lesson →Why it matters to you
Core-and-satellite matters because it channels the urge to be active into a form that can't wreck your finances. Rather than either suppressing the itch entirely or letting it dominate, it caps active bets at a small, survivable share while the low-cost core anchors your results. That structure makes it far more sustainable than betting big on conviction — and it forces honesty, since a satellite that grows too large has stopped being a satellite.
⚠ Letting satellites swell into the core
The whole point of core-and-satellite is that the active bets stay small — but a winning satellite grows, and it's tempting to add to it or let it ride. Before long the 'satellite' is a big chunk of the portfolio, and its risk dominates the very core meant to anchor you. Cap the satellites' total size and trim them back when they outgrow it.