A core-satellite portfolio holds a broad, low-cost "core" and adds a smaller "satellite" tilt toward a theme or region. A common Australian version uses VAS + VGS as the core and NDQ (Betashares Nasdaq 100 ETF) as a United States technology satellite. Equally weighted, the three carry a blended management fee of approximately 0.24% per year.
General information only, not financial advice. Figures are approximate and as at Q2 2026. ETFLens does not hold an Australian Financial Services Licence (AFSL).
Core and satellite explained
The core is the foundation: broad, diversified and low-cost. VAS (0.07% p.a.) covers the Australian market and VGS (0.18% p.a.) covers global developed markets, so together they hold thousands of companies. The satellite is a deliberate, smaller tilt: NDQ (0.48% p.a.) tracks the Nasdaq-100, an index concentrated in large United States technology companies. The idea is to keep most of the portfolio broad while adding a defined tilt in one area.
The overlap to watch
NDQ and VGS are not independent. VGS already holds large United States technology companies as part of its global developed-markets index, so adding NDQ increases exposure to companies VGS already owns. NDQ and VGS share approximately 41% of their holdings by weight. That means a core-satellite portfolio is more concentrated in United States technology than the headline split suggests. You can measure this for yourself with the free ETF overlap checker, or see the detail on the NDQ vs VGS comparison.
Who this suits, and the risk
A core-satellite portfolio is commonly used by investors who want broad diversification but also want a defined growth tilt and accept the extra concentration that comes with it. The main risk is technology concentration: because NDQ overlaps VGS, the combined portfolio's largest holdings (Apple, Microsoft, Nvidia and similar) carry more weight than in the two-fund core alone. A sector or region that has led can also lag; past performance is not a reliable indicator of future returns. Whether this tilt is appropriate depends on your goals and circumstances, which ETFLens cannot assess.
How big should the satellite be?
The defining feature of a core-satellite portfolio is that the core dominates and the satellite is a deliberate minority. There is no fixed rule, but the satellite is usually a smaller share than either core fund, so a poor run in the tilt does not sink the whole portfolio. Sizing the satellite is where the approach asks more of an investor than a simple two-fund core: a larger NDQ weight increases both the potential upside and the technology concentration at the same time. The fee is worth noting too. NDQ (0.48% p.a.) costs more than the broad core funds VAS (0.07% p.a.) and VGS (0.18% p.a.), so a larger satellite lifts the portfolio's blended fee. None of this points to a right answer; the appropriate size depends on your goals and tolerance for concentration, which ETFLens cannot assess.
Next steps
- NDQ vs VGS: the overlap and key differences in full.
- ETF overlap checker: measure the satellite's overlap with your core.
- Lowest-cost global shares ETFs: broad global funds ranked by fee.