FSTBvsAGGETF Comparison
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Fidelity Short-Term Bond ETF (FSTB) belongs to the Intl IG Bonds segment. iShares Core U.S. Aggregate Bond ETF (AGG) is part of the US Aggregate Bonds segment. Both ETFs have the same top 3 sector exposures: Sovereign, Finance and Industrials. FSTB is more expensive with a Total Expense Ratio (TER) of 0.21%, versus 0.03% for AGG. Run a side-by-side ETF comparison of FSTB and AGG 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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FSTB vs AGG performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/18/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | FSTB AGG | -0.63%-1.14% | -0.01%-1.96% | n/a-1.39% | n/a-0.45% | n/a+12.49% | n/a-2.76% |
| Flows | FSTB AGG | +$3M+$1.44B | +$178M+$3.32B | -+$7.53B | -+$11.71B | -+$45.76B | -+$65.06B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | FSTB AGG | +1.34%+3.98% | n/a+3.71% | n/a+5.06% | n/a+5.92% |
| Max drawdown | FSTB AGG | -0.73%-2.59% | n/a-3.24% | n/a-4.86% | n/a-17.71% |
| Max drawdown duration | FSTB AGG | 24d81d | n/a201d | n/a284d | n/a1612d |
Trading data
FSTB | AGG | |
Last sale 9/18/2026 at 1:30 PM | $19.82 | $95.96 |
| Previous close 09/17/2026 | $19.85 | $96.33 |
| Consolidated volume 09/17/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of August 31, 2026
1-year trailing difference
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FSTB
is actively managed and doesn’t replicate an indexFSTB | AGG | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 9/18/2026 at 1:30 PM
Live
Closed
FSTB | AGG | |
|---|---|---|
| Last price | $19.82 | $95.96 |
| 1D performance | -0.15% | -0.38% |
| AuM | $178.25 M | $137.27 B |
| E/R | 0.21% | 0.03% |
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Exposure
Countries
FSTB
USA
67.17%
Other
32.83%
AGG
USA
77.45%
Other
22.55%
Sectors
FSTB
Sovereign
40.52%
Finance
28.85%
Other
30.63%
AGG
Sovereign
47.55%
Finance
10.22%
Industrials
7.11%
Other
35.12%
Diversification
FSTB
Total weight of top 15 holdings out of 15
45.28%
AGG
Total weight of top 15 holdings out of 15
8.32%
Top 15 holdings
Data as of July 31, 2026
FSTB
USA, Notes 3.875% 15may2029, USD (AN-2029)
10.23%
USA, Notes 3.375% 15sep2028, USD (AS-2028)
6.64%
USA, Notes 3.5% 15dec2028, USD (AV-2028)
6.61%
USA, Notes 3.625% 15aug2028, USD (AR-2028)
6.51%
USA, Notes 3.5% 15feb2029, USD (AK-2029)
5.54%
USA, Notes 4.625% 30sep2028, USD (AD-2028)
3.81%
US31635A1051
2.29%
USA, Notes 4% 31may2028, USD (BC-2028)
1.03%
Bank of America Corporation, 4.271% 23jul2029, USD (N)
0.46%
JP Morgan, 4.851% 25jul2028, USD
0.38%
US12567MAN11
0.38%
Bank of America Corporation, 4.979% 24jan2029, USD (N)
0.37%
US33884EAQ44
0.36%
Goldman Sachs, 4.148% 21jan2029, USD
0.34%
Avolon Holdings, 4.95% 15jan2028, USD
0.33%
AGG
BlackRock Cash Funds - Institutional
2.85%
USA, Notes 4.625% 15feb2035, USD (B-2035)
0.42%
USA, Notes 4% 28feb2030, USD (H-2030)
0.41%
USA, Notes 4.25% 15nov2034, USD (F-2034)
0.41%
USA, Notes 4.375% 15may2034, USD (C-2034)
0.40%
USA, Notes 4.125% 15feb2036, USD (B-2036)
0.40%
USA, Notes 3.875% 15aug2034, USD (E-2034)
0.40%
USA, Notes 4.25% 15aug2035, USD (E-2035)
0.40%
USA, Notes 4.25% 15may2035, USD (C-2035)
0.39%
USA, Notes 4.5% 15nov2033, USD (F-2033)
0.39%
USA, Notes 4% 15feb2034, USD (B-2034)
0.39%
USA, Notes 4% 15nov2035, USD (F-2035)
0.38%
USA, Notes 3.875% 15jul2028, USD (AQ-2028)
0.36%
USA, Notes 3.875% 15jun2028, USD (AP-2028)
0.36%
USA, Notes 3.875% 15aug2033, USD (E-2033)
0.35%
Frequently asked questions about FSTB and AGG
Which ETF is bigger: FSTB or AGG?
As of September 18, 2026, FSTB holds $178.25 M in assets under management (AUM), while AGG manages $137.27 B.
What sectors do the FSTB and AGG ETFs invest in?
FSTB leans toward sectors like Sovereign and Finance. Meanwhile, AGG focuses on Sovereign, Finance and Industrials.
What are the top holdings of the FSTB ETF and AGG ETF?
FSTB top holdings include USA, Notes 3.875% 15may2029, USD (AN-2029), USA, Notes 3.375% 15sep2028, USD (AS-2028) and USA, Notes 3.5% 15dec2028, USD (AV-2028). AGG holds in its top three: BlackRock Cash Funds - Institutional, USA, Notes 4.625% 15feb2035, USD (B-2035) and USA, Notes 4% 28feb2030, USD (H-2030).
Which ETF is more diversified: FSTB or AGG?
FSTB holds 412 securities with 45.28% of its assets in the top 15. AGG has 13243 securities and a top 15 weight of 8.32%.
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