IOZ vs STW: Which ETF Is Better?
A side-by-side comparison of fees, size, returns and holdings, using data to 30 September 2026.
IOZ comes out ahead on 4 of 5 measures. Which matters most depends on you.
The short answer
Bigger funds usually trade more cheaply and are less likely to close.
IOZ vs STW side by side
| IOZ leads on 4, STW on 1 | IOZiShares Core S&P/ASX 200 ETF | STWSPDR S&P/ASX 200 ETF |
|---|---|---|
| The basics | ||
| Index tracked | S&P/ASX 200 Index | S&P/ASX 200 Index |
| Fund manager | iShares | State Street (SPDR) |
| Asset class | Australian shares | Australian shares |
| Listed | Dec 2010 | Aug 2001 |
| Cost and size | ||
| MERyearly fee, lower is better | 0.05% | 0.05% |
| AUMfund size | $9.7bn✓ | $6.5bn |
| Net flows (Sep)new money in, last month | $321m✓ | −$33m |
| Bid/ask spreadtrading cost, lower is better | 0.04% | 0.03% |
| Total returns | ||
| 1 month | −2.4% | −2.4% |
| 1 year | +2.6% | +2.6% |
| 3 years p.a. | +10.8% | +11.0%✓ |
| 5 years p.a. | +6.8%✓ | +6.7% |
| $10,000 invested | ||
| 1 year ago | $10,262 | $10,261 |
| 5 years ago | $13,895✓ | $13,821 |
✓ marks the better figure on each measure. Returns include distributions, to 30 September 2026.
IOZ vs STW price chart
Both ETFs on one chart as % change. Use the 1D to All buttons to change the period. Price only, so it leaves out distributions · TradingView
What $10,000 invested is worth now
$10,000 put into IOZ 5 years ago is worth $13,895 today, against $13,821 in STW. That is $74 more in IOZ.
Total returns to 30 September 2026, with distributions reinvested, before tax and brokerage. The price chart above leaves out distributions, so it can look worse. Past performance is not a reliable indicator of future performance.
What the fees cost you
IOZ and STW charge the same fee, so fees make no difference between them.
Total fees paid on a $100,000 investment, assuming a 7% a year return before fees. Illustration only: it ignores tax, brokerage and differences in returns.
IOZ and STW overlap
196 companies appear in both funds. Overlap is the share of the portfolio that is the same in both, counting the smaller weight of each shared company.
| Biggest shared holdings | % of IOZ | % of STW |
|---|---|---|
| 10.83% | 10.83% | |
| 10.33% | 10.34% | |
| 4.79% | 4.78% | |
| 4.66% | 4.67% | |
| 4.56% | 4.55% | |
| 3.56% | 3.56% | |
| 3.22% | 3.22% | |
| 3.19% | 3.21% | |
| 2.35% | 2.34% | |
| 2.05% | 2.05% | |
| 2.04% | 2.06% | |
| 2.03% | 2.03% |
Add more ETFs and see the overlap in Compare ETFs →
Best-endeavours estimate. Built from each issuer's published holdings, which may be weeks or months old, may cover only part of a fund (some publish only their top 10) and are matched by company name. Figures may be incomplete or inaccurate. Check the issuer's website and PDS before relying on them. General information only.
Get the full IOZ vs STW report
- Every holding of each ETF: the top 50 companies, with sectors and countries
- Exactly which companies they share, and how much of each
- Fees in dollars over 10, 20 and 30 years
- Every metric side by side, including the index each tracks
- ★ FREE BONUSIs now a good time to invest? The Market Health-O-Meter
FAQs
Which is better, IOZ or STW?
It depends on what you need. On our numbers IOZ wins on 4 measures and STW on 1. IOZ is the larger fund at $9.7bn vs $6.5bn. STW has the better 3-year return: +11.0% a year vs +10.8%. IOZ has the better 5-year return: +6.8% a year vs +6.7%.
Which is cheaper, IOZ or STW?
IOZ charges 0.05% a year and STW charges 0.05% a year.
Can I hold both IOZ and STW?
You can, but check how much they overlap. IOZ is a Australian shares fund and STW is a Australian shares fund.
More comparisons
General information only, not a recommendation. Past performance is not a reliable indicator of future performance.