AAUSvsSPYETF Comparison
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Alpha Architect US Equity ETF (AAUS) belongs to the US Multi-Factor segment. State Street SPDR S&P 500 ETF Trust (SPY) is part of the US Large Cap segment. Both ETFs have the same top 3 sector exposures: Technology, Finance and Consumer Non-Cyclicals. AAUS is less expensive with a Total Expense Ratio (TER) of 0.09%, versus 0.0945% for SPY. AAUS is up 7.46% year-to-date (YTD) with -$31M in YTD flows. SPY performs better with 8.95% YTD performance, and +$14.30B in YTD flows. Run a side-by-side ETF comparison of AAUS and SPY below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
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AAUS vs SPY performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 07/27/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | AAUS SPY | -0.07%-0.31% | +3.40%+3.61% | +7.46%+8.95% | +17.38%+17.29% | n/a+69.52% | n/a+80.18% |
| Flows | AAUS SPY | -$20M+$2.61B | -$28M+$30.28B | -$31M+$14.30B | -$34M+$22.45B | -+$70.62B | -+$102.14B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | AAUS SPY | +12.57%+12.85% | +12.74%+12.70% | n/a+15.03% | n/a+16.97% |
| Max drawdown | AAUS SPY | -4.54%-4.46% | -9.13%-8.89% | n/a-18.74% | n/a-24.50% |
| Max drawdown duration | AAUS SPY | 56d55d | 92d76d | n/a126d | n/a708d |
Trading data
AAUS | SPY | |
Last sale 7/28/2026 at 1:30 PM | $59.42 | $740.47 |
| Previous close 07/27/2026 | $59.18 | $739.09 |
| Consolidated volume 07/27/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of June 30, 2026
1-year trailing difference
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AAUS
is actively managed and doesn’t replicate an indexAAUS | SPY | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 7/28/2026 at 1:30 PM
Live
Closed
AAUS | SPY | |
|---|---|---|
| Last price | $59.42 | $740.47 |
| 1D performance | +0.40% | +0.19% |
| AuM | $494.06 M | $785.17 B |
| E/R | 0.09% | 0.0945% |
Characteristics
AAUS | SPY | |
|---|---|---|
| Management strategy | Active | Passive |
| Provider | Alpha Architect | State Street Investment Management |
| Benchmark | - | S&P 500 Index |
| N° of holdings | 348 | 496 |
| Asset class | - | Equities |
| Trailing 12m distribution yield | Join | Join |
| Inception date | July 23, 2025 | January 22, 1993 |
| ESG | No | No |
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Exposure
Countries
AAUS
USA
97.72%
Other
2.28%
SPY
USA
97.3%
Other
2.7%
Sectors
AAUS
Technology
46.11%
Finance
12.87%
Consumer Non-Cycl.
9.36%
Healthcare
9.02%
Industrials
7.51%
Other
15.13%
SPY
Technology
45.7%
Finance
13.13%
Consumer Non-Cycl.
8.76%
Healthcare
8.66%
Industrials
7.93%
Other
15.81%
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Diversification
AAUS
Total weight of top 15 holdings out of 15
45.33%
SPY
Total weight of top 15 holdings out of 15
43.05%
Top 15 holdings
Data as of June 30, 2026
AAUS
Apple, Inc.
7.47%
NVIDIA Corp.
7.44%
Microsoft Corp.
5.11%
Amazon.com, Inc.
3.69%
Alphabet, Inc.
3.18%
Alphabet, Inc.
2.87%
Broadcom Inc.
2.60%
Meta Platforms, Inc.
1.99%
Micron Technology, Inc.
1.96%
Eli Lilly & Co.
1.71%
Tesla, Inc.
1.71%
Berkshire Hathaway, Inc.
1.63%
JPMorgan Chase & Co.
1.56%
Advanced Micro Devices, Inc.
1.32%
Johnson & Johnson
1.09%
SPY
NVIDIA Corp.
7.50%
Apple, Inc.
6.57%
Microsoft Corp.
4.29%
Amazon.com, Inc.
3.61%
Alphabet, Inc.
3.24%
Broadcom Inc.
2.77%
Alphabet, Inc.
2.58%
Micron Technology, Inc.
2.01%
Meta Platforms, Inc.
1.91%
Tesla, Inc.
1.83%
Eli Lilly & Co.
1.47%
Advanced Micro Devices, Inc.
1.47%
Berkshire Hathaway, Inc.
1.42%
JPMorgan Chase & Co.
1.36%
Intel Corp.
1.02%
Frequently asked questions about AAUS and SPY
How have the AAUS and SPY ETFs performed in 2026?
As of July 27, 2026, AAUS is up 7.46% year-to-date (YTD), while SPY has returned 8.95%. That puts SPY better performer ahead so far this year.
Which ETF is attracting more investor money: AAUS or SPY?
Year-to-date, the AAUS ETF saw -$31M in flows, compared to +$14.30B for SPY.
Which ETF is more volatile: AAUS or SPY?
Over the past year, AAUS had a volatility of 12.74%, while SPY experienced 12.7%.
Which ETF is bigger: AAUS or SPY?
As of July 27, 2026, AAUS holds $494.06 M in assets under management (AUM), while SPY manages $785.17 B.
What sectors do the AAUS and SPY ETFs invest in?
AAUS leans toward sectors like Technology, Finance and Consumer Non-Cyclicals. Meanwhile, SPY focuses on Technology, Finance and Consumer Non-Cyclicals.
What are the top holdings of the AAUS ETF and SPY ETF?
AAUS top holdings include Apple, Inc., NVIDIA Corp. and Microsoft Corp.. SPY holds in its top three: NVIDIA Corp., Apple, Inc. and Microsoft Corp..
Which ETF is more diversified: AAUS or SPY?
AAUS holds 349 securities with 45.33% of its assets in the top 15. SPY has 501 securities and a top 15 weight of 43.05%.
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