Portfolio
All-World or S&P 500? One ETF for Your Entire Portfolio
Key takeaways
- An All-World ETF (e.g. VWCE) holds ~3,700 companies from 23+ countries; the S&P 500 holds only 500 US firms.
- Even in a global index, the US accounts for roughly 60–65% — "global" does not mean "without America".
- A single broad ETF is sufficient as a complete portfolio core; country rebalancing happens automatically inside the fund.
- The S&P 500 has historically returned more, but it is more concentrated and bets on continued US dominance.
- The choice is about risk and conviction, not a "right answer" — both are low-cost and tax-efficient in their accumulating variants.
This is perhaps the most common question from beginning investors: should I buy the whole world, or just America? Both routes are legitimate and both rest on a single low-cost ETF. Let us put them side by side.
What is what
A global ETF (such as Vanguard FTSE All-World — VWCE, or Invesco FTSE All-World — FWRG) tracks an index of roughly 3,700 companies from 23 developed and dozens of emerging countries. With one purchase you own a slice of almost the entire world economy.
The S&P 500 (e.g. CSPX) holds 500 of the largest US companies. It is the world's most watched equity index and has been the engine of global returns for decades.
The myth that "global = without the US"
Here is an important detail many overlook: even in a global index, the US weighs roughly 60–65%, because the index weights companies by market capitalisation. When you buy All-World, you are still largely buying Apple, Microsoft and Nvidia — you simply add Europe, Japan, Korea and emerging markets on top. The difference versus a pure S&P 500 is therefore not "world vs. US" but "US + rest of world vs. US only".
Diversification vs. concentration
All-World is more diversified: if the US market lags over the long run (as it did in some past decades), the rest of the world offsets part of that shortfall. The trade-off is that slower regions "drag" you when the US is surging.
The S&P 500 is a concentrated bet on the continued dominance of the US economy and its technology giants. Historically higher returns, but also higher dependence on one market and a handful of companies at the top of the index.
When does each make sense
- You want maximum simplicity and peace of mind → one All-World ETF as a complete core. "Buy and forget."
- You believe in the long-term superiority of the US and can stomach higher volatility → S&P 500, optionally complemented by satellites.
- You do not want to decide → a combination: the bulk in All-World, a smaller satellite in the S&P 500 or NASDAQ for extra growth.
Whatever you choose, the key is to stick to the plan and invest regularly. How different compositions perform over time is shown by the growth projector; specific funds are in the ETF overview.
FAQ
Is a single All-World ETF enough as a complete portfolio?
Yes. A global ETF holds thousands of companies across countries and is a fully-fledged, diversified core. More funds do not automatically mean better diversification.
How much of a global index is the US?
Roughly 60–65%, because the index weights companies by market capitalisation and US firms are the largest. A global index is therefore not a bet against the US.
Which has earned more — the S&P 500 or All-World?
Historically the S&P 500 in most periods, but at the cost of higher concentration and dependence on the US market. Past returns do not guarantee future results.
Can I combine both?
Yes, it is common: the bulk in All-World as the core and a smaller satellite in the S&P 500 or NASDAQ for higher growth potential.