Data as of Oct 28, 2026.
AIOO vs VOO: Differences, Returns & Fees
Over the year to Oct 28, 2026, AIOO returned +3.1% to VOO's +13.7%, and VOO charges 0.03% to AIOO's 0.64%.
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Net assets: $63m on Oct 27, 2026 for AllianzIM U.S. Equity Buffer100 Protection ETF - Jan, and $1.0tn on Sep 30, 2026 for Vanguard S&P 500 ETF.
Pair scorecard
VOO costs 0.61 points a year less; their one-year returns differ by 10.6 points.
| Measure | AIOO | VOO |
|---|---|---|
| Return | ||
| Total return, 1 year | +3.1% | +13.7% |
| Drawdown | ||
| Index fall to the buffer | 1.3% | |
| Fund price fall to the buffer | 0.4% | |
| Benchmark | ||
| What it tracks | SPY | S&P 500 Index |
| The outcome period | ||
| Buffer left, in index points | 100.0% of 100.0% | |
| Days left in the period | 64 | |
| Period ends | Dec 31, 2026 | |
| Cost and size | ||
| Expense ratio | 0.64% | 0.03% |
| Net assets, AIOO as of Oct 27, 2026 and VOO as of Sep 30, 2026 | $63m | $1.0tn |
| Holdings | ||
| Holdings in common | not published | |
| Top ten holdings, share of the fund | 39.1% | |
Side by side
AIOO and VOO on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.
AIOO
This fund has no cap. It takes a share of any further rise in SPY. The fund's price can fall 0.4% from here before the buffer starts absorbing losses, by the issuer's number. In index terms, SPY can fall 1.3% from today's level to the point where the buffer begins. Protection left, in index points: 100.0% of the 100.0% buffer still sits below today's SPY level. 64 days remained on Oct 28, 2026. On Dec 31, 2026 the period ends and new terms are set.
VOO
VOO tracks the S&P 500. Over the year to Oct 28, 2026 it returned +13.7% with distributions reinvested, against +13.7% for its benchmark, the S&P 500 Index. The prospectus expense ratio is 0.03% a year. By its holdings published by its issuer as of Sep 30, 2026, 100% of the fund by weight is stocks the S&P 500 also holds, across 507 positions, with the top ten at 39.1%.
Questions people ask
- Are AIOO and VOO in the same category?
- AIOO is a buffer ETF and VOO is a stock ETF, so they do different jobs. The table compares what both publish: return, cost and holdings.
- Which returned more over the last year, AIOO or VOO?
- In the year to Oct 28, 2026, with distributions reinvested, AIOO returned +3.1% and VOO +13.7%.
- Which is cheaper, AIOO or VOO?
- VOO is cheaper, by 0.61 percentage points a year. That is about $61 on $10,000 held for a year. Fees come from each fund's prospectus.
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ETFIQ, AIOO against VOO, data as of Oct 28, 2026. https://etfiq.com/compare/any/aioo-vs-voo
ETFIQ. (Oct 28, 2026). AIOO against VOO. Retrieved from https://etfiq.com/compare/any/aioo-vs-voo
[AIOO against VOO (ETFIQ, Oct 28, 2026)](https://etfiq.com/compare/any/aioo-vs-voo)
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