VSDBvsMFSBETF Comparison
VS
Vanguard Short Duration Bond ETF (VSDB) and MFS Active Core Plus Bond ETF (MFSB) belong to the same industry segment: US Aggregate Bonds. Both ETFs have the same top 3 sector exposures: Sovereign, Finance and Industrials. VSDB is less expensive with a Total Expense Ratio (TER) of 0.15%, versus 0.34% for MFSB. VSDB is up 0.67% year-to-date (YTD) with +$1.03B in YTD flows. MFSB performs worse with -1.38% YTD performance, and +$583M in YTD flows. Run a side-by-side ETF comparison of VSDB and MFSB 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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VSDB vs MFSB performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 10/19/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | VSDB MFSB | -0.23%-1.00% | -0.62%-1.92% | +0.67%-1.38% | +1.14%-1.38% | n/an/a | n/an/a |
| Flows | VSDB MFSB | +$98M+$151M | +$237M+$244M | +$1.03B+$583M | +$1.06B+$630M | -- | -- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | VSDB MFSB | +1.94%+4.02% | +1.79%+3.52% | n/an/a | n/an/a |
| Max drawdown | VSDB MFSB | -1.54%-3.18% | -1.54%-4.09% | n/an/a | n/an/a |
| Max drawdown duration | VSDB MFSB | 55d55d | 55d232d | n/an/a | n/an/a |
Trading data
VSDB | MFSB | |
Last sale 10/20/2026 at 7:31 PM | $74.68 | $24.04 |
| Previous close 10/19/2026 | $74.72 | $23.99 |
| Consolidated volume 10/19/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
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Main metrics
Last update 10/20/2026 at 7:31 PM
Live
Closed
VSDB | MFSB | |
|---|---|---|
| Last price | $74.68 | $24.04 |
| 1D performance | -0.05% | +0.23% |
| AuM | $1.13 B | $718.86 M |
| E/R | 0.15% | 0.34% |
Exposure
Countries
VSDB
USA
50.09%
Other
49.91%
MFSB
USA
57.49%
Other
42.51%
Sectors
VSDB
Sovereign
27.49%
Finance
19.95%
Other
52.55%
MFSB
Sovereign
27.4%
Finance
19.95%
Industrials
8.05%
Other
44.6%
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Diversification
VSDB
Total weight of top 15 holdings out of 15
14.89%
MFSB
Total weight of top 15 holdings out of 15
27.94%
Top 15 holdings
Data as of August 31, 2026
VSDB
USA, Notes 3.375% 31dec2027, USD (BM-2027)
2.04%
USA, Notes 3.875% 30nov2027, USD (AG-2027)
1.59%
USA, Notes 4.25% 30jun2029, USD (AA-2029)
1.38%
USA, Notes 0.625% 31dec2027, USD (T-2027)
1.31%
USA, Notes 4.5% 31may2029, USD (Z-2029)
1.25%
USA, Notes 4.25% 15feb2028, USD (AK-2028)
1.09%
USA, Notes 3.625% 31aug2029, USD (AC-2029)
0.97%
USA, Notes 4.25% 31jul2028, USD (BE-2028)
0.86%
US21H0526945
0.72%
US38385MP426
0.70%
USA, Notes 3.625% 31dec2030, USD (AH-2030)
0.64%
Dominican Republic, 4.5% 30jan2030, USD
0.63%
US01F0526982
0.60%
US3136G5WN60
0.57%
USA, Notes 3.5% 15jan2029, USD (AJ-2029)
0.55%
MFSB
USA, Bonds 4.625% 15nov2045, USD
9.13%
USA, Notes 3.875% 31jul2030, USD (AB-2030)
4.69%
USA, Bonds 4.625% 15nov2055, USD
3.92%
USA, Notes 4.125% 31oct2029, USD (AF-2029)
2.46%
US01F0306948
0.97%
USA, Bonds 4.625% 15nov2044, USD
0.92%
USA, Bonds 4.875% 15aug2045, USD
0.89%
USA, Bonds 4.5% 15nov2054, USD
0.88%
Boston Properties LP, 5.75% 15jan2035, USD
0.66%
Bank of America Corporation, 5.744% 12feb2036, USD (N)
0.61%
Highwoods Realty, 5.35% 15jan2033, USD
0.61%
Jefferies Financial Group, 5.5% 15feb2036, USD
0.57%
Corebridge Financial, 5.75% 15jan2034, USD
0.56%
US12570XAQ51
0.55%
USA, Bonds 4.25% 15feb2054, USD
0.54%
Frequently asked questions about VSDB and MFSB
How have the VSDB and MFSB ETFs performed in 2026?
As of October 19, 2026, VSDB is up 0.67% year-to-date (YTD), while MFSB has lost -1.38%. That puts VSDB better performer ahead so far this year.
Which ETF is attracting more investor money: VSDB or MFSB?
Year-to-date, the VSDB ETF saw +$1.03B in flows, compared to +$583M for MFSB.
Which ETF is more volatile: VSDB or MFSB?
Over the past year, VSDB had a volatility of 1.79%, while MFSB experienced 3.52%.
Which ETF is bigger: VSDB or MFSB?
As of October 19, 2026, VSDB holds $1.13 B in assets under management (AUM), while MFSB manages $718.86 M.
What sectors do the VSDB and MFSB ETFs invest in?
VSDB leans toward sectors like Sovereign and Finance. Meanwhile, MFSB focuses on Sovereign, Finance and Industrials.
What are the top holdings of the VSDB ETF and MFSB ETF?
VSDB top holdings include USA, Notes 3.375% 31dec2027, USD (BM-2027), USA, Notes 3.875% 30nov2027, USD (AG-2027) and USA, Notes 4.25% 30jun2029, USD (AA-2029). MFSB holds in its top three: USA, Bonds 4.625% 15nov2045, USD, USA, Notes 3.875% 31jul2030, USD (AB-2030) and USA, Bonds 4.625% 15nov2055, USD.
Which ETF is more diversified: VSDB or MFSB?
VSDB holds 1440 securities with 14.89% of its assets in the top 15. MFSB has 463 securities and a top 15 weight of 27.94%.
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Latest news about VSDB & MFSB
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