How to Build Your Core Portfolio with ETFs

This post goes one level deeper. It's about the core portion of that framework — what it is, how to build it, and why keeping it simple isn't a compromise. It's the strategy.

The goal of a core portfolio is simplicity. Keep It Simple, Stupid (KISS) isn't just a principle for engineers — it's the most underrated edge in investing. The research backs it up, and we'll show you the numbers. Start with one diversified ETF. Add another only if there's a genuine, specific reason. Most investors never need more than three holdings total.

What Makes an ETF "Core"?

Not every ETF belongs in a core portfolio. A lot of popular ETFs — even well-known ones — are satellites by nature. Using them as a core is a common mistake that adds concentration risk while looking like diversification on the surface.

A core ETF must meet four criteria:

Here are some examples of how those rules apply to popular ETFs Australians actually buy. This is not a definitive list — you can apply these same criteria to any ETF on the ASX to determine whether it belongs in your core or your satellite portfolio:

Here's the reasoning for each classification:

• QRE — satellite. Single sector (resources), ~50 stocks, high volatility. Useful as a tilt, not as a foundation.

• VBTC — satellite. Single asset (Bitcoin), extreme volatility. No place in a core.

• CNEW — satellite. Single country exposure (China), very high volatility driven by regulatory and geopolitical risk.

• BEMG — borderline. 1,100+ stocks across 11 sectors looks diversified, but emerging market exposure drives high volatility. Acceptable as a small allocation alongside a core, not as the core itself.

• NDQ — borderline. Only 100 stocks and concentrated in three sectors (tech, communication, consumer discretionary). Massive market cap and strong returns make it tempting, but it fails the breadth test. A complement, not a core.

• VHY — income tilt. 65 stocks, Australian high-yield focus. Not a core diversifier on its own, but a useful add-on for income-focused investors alongside a diversified core.

The Diversified ETFs: What's Inside Each One?

Once you've narrowed to genuine core candidates, the next question is which diversified ETF to use. The all-in-one funds do the heavy lifting for you — asset allocation, geographic diversification, and rebalancing are all built in.

A few notes on these:

DHHF is Betashares' 100% growth, 100% equities option. At 0.19% MER, it's the lowest-cost all-in-one on the ASX. The underlying exposure spans approximately 37% Australian equities, 40% international developed (unhedged), 17% developed markets hedged, and 6% emerging markets — roughly 8,000 stocks across the globe.

VDHG is Vanguard's high growth option. It adds a 10% defensive allocation (bonds and cash), which slightly reduces volatility but also reduces returns in long bull runs. At 0.27% MER and ~7,300 holdings, it's marginally pricier than DHHF but has a longer live track record.

VDGR, VDBA, VDCO are the moderate, balanced, and conservative options for investors closer to retirement or with lower risk tolerance. Same fees, same global structure, just a progressively larger bond allocation.

The holdings count matters. Each of these funds gives you exposure to thousands of companies in a single trade.

This is the key structural advantage of a diversified ETF: no single company, sector, or country carries your portfolio. For more on how these overlap and why that's not a problem, see our ETF overlap analysis.

For a detailed head-to-head on the all-in-one options, see our VDHG vs DHHF vs GHHF comparison.

Long-Term Performance

Five years of data shows a clear pattern: more growth allocation equals higher returns, but also higher volatility. The table below uses cumulative and annualised returns across the Vanguard diversified range and DHHF.

Sources: InvestSMART DHHF, InvestSMART VDHG

The 14.5 percentage point gap between DHHF and VDHG over five years is entirely explained by the defensive allocation in VDHG and DHHF's lower fee. Both hold similar underlying equities. Bonds drag returns in rising markets; they protect in falling ones.

The key insight for long-term investors: if you hold a cash buffer to cover 6–12 months of expenses (as outlined in our Market Correction Playbook), you don't need your ETF to act as a shock absorber. Your cash does that job. That frees you to hold 100% growth in your core ETF — DHHF or VDHG — without lying awake during corrections.

For more on how fees compound over time, see our complete guide to ETF fees and performance.

Level 1: One ETF Is Enough

This is where most investors get it wrong — not by being reckless, but by overcomplicating. Adding more ETFs feels like doing more. It usually isn't.

The academic case was made in 1968. Evans and Archer's landmark paper demonstrated that the benefits of diversification plateau at roughly 20–30 stocks. Beyond that, adding more holdings produces negligible reduction in portfolio-specific risk. A diversified ETF holds 7,000–8,000 stocks — that's 200-400x the threshold.

More recently, a Investment Markets article (April 2026) confirmed: "even two or three well-diversified ETFs will achieve the maximum diversification goals." An Erasmus University thesis on over-diversification found diversification benefits are minimal beyond 50 stocks — and every ETF on this list holds multiples of that. A Nordic Venture Development study (October 2025) found the sweet spot for a fund-of-funds portfolio is 6–10 ETFs — but a single diversified ETF already IS a fund of funds internally. You're not holding one ETF. You're holding 8,000 companies through one trade.

The marginal benefit of your 2nd ETF is meaningful. Your 3rd, smaller. Your 4th — negligible. Your 5th and beyond? You're adding complexity, cost, and behavioural risk with almost no diversification gain.

For most investors: DHHF or VDHG as a single holding.

One trade. 7,000–8,000 stocks. Global geographic exposure. Automatic rebalancing. Fees under 0.27% per year. This is enough. See also our beginner's guide to ETF investing in Australia for context on how to get started.

Level 2: Add an Income Tilt

Some investors — particularly retirees or those building a passive income stream — want franking credits and regular distributions, not just capital growth. This is a legitimate reason to add a second ETF.

The two main options:

VHY focuses on Australian equities with high dividend yields — banks, infrastructure, and resources dominate. Because your core (DHHF or VDHG) already holds Australian equities, adding VHY deliberately overweights Australia for income and franking credit purposes. That's a deliberate tilt, not an accident.

WDIV does the same internationally. If you're holding DHHF (which already has global exposure), WDIV adds a global income bias on top.

For most income-focused investors, a Core + VHY combination is the simplest answer: two ETFs, two jobs, no overlap confusion. For a deeper look at Australian dividend ETFs, see our high dividend income ETF analysis.

Beyond the Core: Your Satellite Portfolio

Any ETF that falls outside the core parameters — concentrated sectors, single countries, commodities, crypto, thematic bets — belongs in your satellite portfolio, not your core.

The satellite portfolio is where you take tactical positions on sectors and themes that your core structurally underweights. Gold, energy, commodities, China, infrastructure, defence — these are all legitimate satellite holdings, but they should be treated differently from your core.

The key rules for the satellite portfolio:

• Up to 10 holdings at 10% each (of the satellite allocation) — this is the maximum. Any more and you're overdiversifying the part of your portfolio that's supposed to express specific views.

• Actively managed for trend — unlike the core, which is set-and-forget, satellites should be monitored. When a theme breaks its uptrend, reduce or exit. When a new opportunity emerges, consider adding.

• Separate from your core — your core stays untouched through every market cycle. Your satellite is where you can be tactical without compromising the foundation.

We will cover the satellite portfolio in depth in a dedicated blog — how to select satellite ETFs, how to size positions, when to rotate, and how to monitor trend. For now, the key takeaway is: keep core and satellite separate in your mind and your portfolio. The core is your foundation. The satellite is where you express views.

For more on which ETFs to hold long-term vs trade, see Which ETFs Should You Hold Long-Term and Which Should You Trade?. For context on active vs passive choices, see our active vs passive ETF data analysis.

The DIY Core Alternative: VAS + VGS

Some investors prefer to build their own core rather than use an all-in-one ETF. The main reason is control — you decide the AU/global split instead of accepting the fund manager's default allocation.

The classic two-ETF DIY core:

Combined, VAS + VGS gives you roughly 1,800 stocks across Australian and global developed markets. The blended fee is lower than any all-in-one — around 0.10–0.13% depending on your split — but you're responsible for rebalancing and you don't get emerging markets exposure by default.

This is the most popular DIY approach in Australia. For a detailed breakdown of whether it actually outperforms the all-in-one alternatives, see our 2-ETF portfolio analysis.

The short version: VAS + VGS is excellent. The fee saving over DHHF is real but modest. The all-in-ones earn their slight premium through automatic rebalancing and built-in emerging markets. Choose based on whether you want to manage the split yourself.

For investors still weighing ETFs against individual stock picking, our ETF vs direct shares comparison covers the data directly.

Summary: The Core Portfolio Decision Tree

Start simple. Add with purpose. Stop before you're done.

The research is consistent: one well-diversified ETF achieves the vast majority of what a 10-ETF portfolio achieves, with lower cost, lower complexity, and lower behavioural risk. Every additional holding after your 3rd needs a specific, articulable reason — not just "it seems like a good ETF."

No fund manager wrote this article.

Explore Further

• Browse ETF data and comparisons at ReviewETF

• Watch our ETF breakdowns on YouTube @ETFadviser

• If you want to know which core ETFs we like and why, subscribe to ETF Adviser on Substack

Sources: Evans and Archer (1968) — Diversification and the Reduction of Dispersion; Investment Markets — How Many ETFs Is Too Many? (April 2026); Erasmus University thesis on over-diversification; Nordic Venture Development — Optimal Number of ETFs in a Portfolio (October 2025); Betashares DHHF product page; InvestSMART DHHF performance data; InvestSMART VDHG performance data