ISTBvsBSVETF Comparison
VS
iShares Core 1-5 Year USD Bond ETF (ISTB) belongs to the US Aggregate Bonds segment. Vanguard Short-Term Bond ETF (BSV) is part of the US Government Bonds segment. ISTB's top 3 sector exposures are Sovereign, Finance and Industrials. In contrast, BSV's top sector exposures are Sovereign, Finance and Technology. ISTB is more expensive with a Total Expense Ratio (TER) of 0.06%, versus 0.03% for BSV. ISTB is up 0.53% year-to-date (YTD) with +$765M in YTD flows. BSV performs worse with 0.47% YTD performance, and +$5.28B in YTD flows. Run a side-by-side ETF comparison of ISTB and BSV 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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ISTB vs BSV performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 10/23/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | ISTB BSV | +0.65%+0.82% | +0.13%+0.25% | +0.53%+0.47% | +1.21%+1.07% | +15.88%+14.33% | +10.33%+9.20% |
| Flows | ISTB BSV | +$208M+$9M | +$303M+$1.61B | +$765M+$5.28B | +$892M+$9.11B | +$1.25B+$13.49B | -$427M+$6.79B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | ISTB BSV | +2.03%+2.09% | +1.81%+1.86% | +2.14%+2.22% | +2.68%+2.75% |
| Max drawdown | ISTB BSV | -1.51%-1.46% | -1.51%-1.46% | -1.51%-1.49% | -8.72%-7.94% |
| Max drawdown duration | ISTB BSV | 59d59d | 59d59d | 59d150d | 968d976d |
Trading data
ISTB | BSV | |
Last sale 10/26/2026 at 1:30 PM | $47.41 | $76.77 |
| Previous close 10/23/2026 | $47.44 | $76.79 |
| Consolidated volume 10/23/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of September 30, 2026
1-year trailing difference
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ISTB | BSV | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 10/26/2026 at 1:30 PM
Live
Closed
ISTB | BSV | |
|---|---|---|
| Last price | $47.41 | $76.77 |
| 1D performance | -0.06% | -0.03% |
| AuM | $5.33 B | $46.53 B |
| E/R | 0.06% | 0.03% |
Characteristics
ISTB | BSV | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | iShares | Vanguard |
| Benchmark | Bloomberg U.S. Universal 1-5 Year Index | Bloomberg U.S. 1–5 Year Government/Credit Float Adjusted Index |
| N° of holdings | 6956 | 3104 |
| Asset class | Bonds | Bonds |
| Trailing 12m distribution yield | Join | Join |
| Inception date | October 18, 2012 | April 3, 2007 |
| ESG | No | No |
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Exposure
Countries
ISTB
USA
77.86%
Other
22.14%
BSV
USA
87.54%
Other
12.46%
Sectors
ISTB
Sovereign
54.43%
Finance
18.71%
Other
26.86%
BSV
Sovereign
67.1%
Finance
14.58%
Other
18.31%
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Diversification
ISTB
Total weight of top 15 holdings out of 15
12.68%
BSV
Total weight of top 15 holdings out of 15
13.13%
Top 15 holdings
Data as of August 31, 2026
ISTB
USA, Notes 3.875% 15jun2028, USD (AP-2028)
1.09%
USA, Notes 4.125% 30jun2031, USD (AA-2031)
1.06%
BlackRock Cash Funds - Institutional
1.06%
USA, Notes 4% 28feb2030, USD (H-2030)
0.91%
USA, Notes 3.625% 31oct2030, USD (AF-2030)
0.89%
USA, Notes 4.375% 31jul2031, USD (AB-2031)
0.87%
USA, Notes 3.5% 30nov2030, USD (AG-2030)
0.84%
USA, Notes 3.75% 31jan2031, USD (U-2031)
0.81%
USA, Notes 3.625% 30sep2030, USD (AD-2030)
0.81%
USA, Notes 3.625% 31aug2030, USD (AC-2030)
0.79%
USA, Notes 4% 31may2030, USD (Z-2030)
0.77%
USA, Notes 3.875% 15jul2028, USD (AQ-2028)
0.75%
USA, Notes 4% 31jul2029, USD (AB-2029)
0.74%
USA, Notes 4.5% 31may2029, USD (Z-2029)
0.66%
USA, Notes 4.25% 30jun2029, USD (AA-2029)
0.65%
BSV
US91282CRK98
1.98%
USA, Notes 3.5% 31jan2028, USD (U-2028)
1.10%
USA, Notes 3.375% 31dec2027, USD (BM-2027)
0.87%
USA, Notes 4% 28feb2030, USD (H-2030)
0.86%
USA, Notes 4.125% 30jun2028, USD (BD-2028)
0.81%
US91282CRH69
0.80%
USA, Notes 4.375% 31jul2031, USD (AB-2031)
0.79%
USA, Notes 0.875% 15nov2030, USD (F-2030)
0.78%
USA, Notes 3.875% 31mar2028, USD (AZ-2028)
0.76%
USA, Notes 1.125% 15feb2031, USD (B-2031)
0.75%
USA, Notes 3.375% 30nov2027, USD (BL-2027)
0.74%
USA, Notes 4.125% 31may2031, USD (Z-2031)
0.73%
USA, Notes 4.375% 31dec2029, USD (AH-2029)
0.73%
USA, Notes 0.625% 15aug2030, USD (E-2030)
0.72%
USA, Notes 3.5% 30sep2029, USD (AD-2029)
0.72%
Frequently asked questions about ISTB and BSV
How have the ISTB and BSV ETFs performed in 2026?
As of October 23, 2026, ISTB is up 0.53% year-to-date (YTD), while BSV has returned 0.47%. That puts ISTB better performer ahead so far this year.
Which ETF is attracting more investor money: ISTB or BSV?
Year-to-date, the ISTB ETF saw +$765M in flows, compared to +$5.28B for BSV.
Which ETF is more volatile: ISTB or BSV?
Over the past year, ISTB had a volatility of 1.81%, while BSV experienced 1.86%.
Which ETF is bigger: ISTB or BSV?
As of October 23, 2026, ISTB holds $5.33 B in assets under management (AUM), while BSV manages $46.53 B.
What sectors do the ISTB and BSV ETFs invest in?
ISTB leans toward sectors like Sovereign and Finance. Meanwhile, BSV focuses on Sovereign and Finance.
What are the top holdings of the ISTB ETF and BSV ETF?
ISTB top holdings include USA, Notes 3.875% 15jun2028, USD (AP-2028), USA, Notes 4.125% 30jun2031, USD (AA-2031) and BlackRock Cash Funds - Institutional. BSV holds in its top three: US91282CRK98, USA, Notes 3.5% 31jan2028, USD (U-2028) and USA, Notes 3.375% 31dec2027, USD (BM-2027).
Which ETF is more diversified: ISTB or BSV?
ISTB holds 7351 securities with 12.68% of its assets in the top 15. BSV has 3170 securities and a top 15 weight of 13.13%.
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