MBNDvsMBBETF Comparison
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State Street SPDR Nuveen Municipal Bond ETF (MBND) belongs to the Municipal Bonds segment. iShares MBS ETF (MBB) is part of the MBS & ABS segment. MBND's top 1 sector exposures are Municipal. In contrast, MBB's top sector exposures are Industrials, Non-Corporate and Finance. MBND is more expensive with a Total Expense Ratio (TER) of 0.4%, versus 0.04% for MBB. MBND is down -0.68% year-to-date (YTD) with - in YTD flows. MBB performs better with -0.23% YTD performance, and +$1.52B in YTD flows. Run a side-by-side ETF comparison of MBND and MBB 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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MBND vs MBB performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/01/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | MBND MBB | -0.45%-0.12% | -1.39%-0.94% | -0.68%-0.23% | +2.75%+2.87% | +10.21%+14.55% | +0.73%+0.57% |
| Flows | MBND MBB | -+$655M | -+$1.60B | -+$1.52B | -$1M-$888M | -$16M+$12.43B | -$15M+$17.94B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | MBND MBB | +2.31%+4.65% | +2.24%+4.22% | +3.52%+5.84% | +3.35%+6.59% |
| Max drawdown | MBND MBB | -1.98%-1.87% | -2.53%-2.92% | -5.17%-5.51% | -13.56%-17.29% |
| Max drawdown duration | MBND MBB | 57d64d | 184d184d | 190d84d | 1456d1492d |
Trading data
MBND | MBB | |
Last sale 9/2/2026 at 1:30 PM | $26.58 | $92.51 |
| Previous close 09/01/2026 | $26.56 | $92.41 |
| Consolidated volume 09/01/2026 | ||
| 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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MBND
is actively managed and doesn’t replicate an indexMBND | MBB | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 9/2/2026 at 1:30 PM
Live
Closed
MBND | MBB | |
|---|---|---|
| Last price | $26.58 | $92.51 |
| 1D performance | +0.08% | +0.11% |
| AuM | $26.72 M | $39.36 B |
| E/R | 0.4% | 0.04% |
Characteristics
MBND | MBB | |
|---|---|---|
| Management strategy | Active | Passive |
| Provider | State Street Investment Management | iShares |
| Benchmark | - | Bloomberg U.S. MBS Index |
| N° of holdings | 23 | 1231 |
| Asset class | - | Bonds |
| Trailing 12m distribution yield | Join | Join |
| Inception date | February 4, 2021 | March 13, 2007 |
| ESG | No | No |
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Exposure
Countries
MBND
USA
28.34%
Other
71.66%
MBB
USA
29.07%
Other
70.93%
Sectors
MBND
Municipal
28.34%
Other
71.66%
MBB
Industrials
20.93%
Non-Corporate
7.91%
Other
71.16%
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Diversification
MBND
Total weight of top 15 holdings out of 15
36.72%
MBB
Total weight of top 15 holdings out of 15
16.01%
Top 15 holdings
Data as of July 31, 2026
MBND
US040664NJ98
2.92%
US91756SAR40
2.83%
US64971PKD68
2.74%
New Mexico, 4% 1aug2039, USD (2017A)
2.73%
US797661G828
2.55%
Southeast Energy Authority, 5% 1nov2035, USD (2024A)
2.49%
US896032AK58
2.43%
US649451KJ96
2.42%
California Community Choice Financing Authority, 5% 1sep2032, USD (2024E)
2.38%
US56035DGB29
2.37%
US346843PW94
2.33%
Georgia Municipal Electric Authority, 5% 1jan2048, USD (2019B)
2.26%
US679111E426
2.18%
US677561KM32
2.06%
US594712ZR50
2.03%
MBB
BlackRock Cash Funds - Institutional
7.91%
FR SD8146, 2% 1may2051, USD (ABS)
1.00%
US21H0526861
0.98%
US01F0506844
0.66%
US21H0506806
0.58%
US01F0526800
0.56%
G2 MB0025, 5% 20nov2054, USD (ABS)
0.53%
G2 MA7648, 2% 20oct2051, USD (ABS)
0.52%
US36179WTX64
0.51%
FN MA4492, 2% 1dec2051, USD (ABS)
0.50%
FR SD8140, 2% 1apr2051, USD (ABS)
0.48%
US21H0426872
0.46%
US21H0606895
0.45%
US36179WJR07
0.44%
FN MA4465, 2% 1nov2051, USD (ABS)
0.43%
Frequently asked questions about MBND and MBB
How have the MBND and MBB ETFs performed in 2026?
As of September 1, 2026, MBND is down -0.68% year-to-date (YTD), while MBB has lost -0.23%. That puts MBB better performer ahead so far this year.
Which ETF is attracting more investor money: MBND or MBB?
Year-to-date, the MBND ETF saw - in flows, compared to +$1.52B for MBB.
Which ETF is more volatile: MBND or MBB?
Over the past year, MBND had a volatility of 2.24%, while MBB experienced 4.22%.
Which ETF is bigger: MBND or MBB?
As of September 1, 2026, MBND holds $26.72 M in assets under management (AUM), while MBB manages $39.36 B.
What sectors do the MBND and MBB ETFs invest in?
MBND leans toward sectors like Municipal. Meanwhile, MBB focuses on Industrials and Non-Corporate.
What are the top holdings of the MBND ETF and MBB ETF?
MBND top holdings include US040664NJ98, US91756SAR40 and US64971PKD68. MBB holds in its top three: BlackRock Cash Funds - Institutional, FR SD8146, 2% 1may2051, USD (ABS) and US21H0526861.
Which ETF is more diversified: MBND or MBB?
MBND holds 73 securities with 36.72% of its assets in the top 15. MBB has 9388 securities and a top 15 weight of 16.01%.
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Latest news about MBND & MBB
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