MBBvsMBNDETF Comparison
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iShares MBS ETF (MBB) belongs to the MBS & ABS segment. State Street SPDR Nuveen Municipal Bond ETF (MBND) is part of the Municipal Bonds segment. MBB's top 3 sector exposures are Industrials, Non-Corporate and Finance. In contrast, MBND's top sector exposures are Municipal. MBB is less expensive with a Total Expense Ratio (TER) of 0.04%, versus 0.4% for MBND. MBB is down -1.34% year-to-date (YTD) with +$1.52B in YTD flows. MBND performs worse with -1.63% YTD performance, and - in YTD flows. Run a side-by-side ETF comparison of MBB and MBND 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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MBB vs MBND performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/11/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | MBB MBND | -1.48%-2.00% | -2.24%-2.43% | -1.34%-1.63% | -0.12%-0.30% | +13.76%+9.36% | -0.62%-0.25% |
| Flows | MBB MBND | +$655M- | +$892M- | +$1.52B- | -$888M-$1M | +$12.43B-$18M | +$17.94B-$15M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | MBB MBND | +4.76%+2.80% | +4.22%+2.24% | +5.85%+3.55% | +6.60%+3.37% |
| Max drawdown | MBB MBND | -2.79%-3.07% | -3.37%-3.39% | -5.44%-5.17% | -17.29%-13.56% |
| Max drawdown duration | MBB MBND | 74d67d | 194d194d | 75d190d | 1492d1456d |
Trading data
MBB | MBND | |
Last sale 9/11/2026 at 1:30 PM | $91.38 | $26.39 |
| Previous close 09/10/2026 | $91.48 | $26.40 |
| Consolidated volume 09/10/2026 | ||
| 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 indexMBB | MBND | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 9/11/2026 at 1:30 PM
Live
Closed
MBB | MBND | |
|---|---|---|
| Last price | $91.38 | $26.39 |
| 1D performance | -0.11% | -0.06% |
| AuM | $38.92 B | $26.46 M |
| E/R | 0.04% | 0.4% |
Characteristics
MBB | MBND | |
|---|---|---|
| Management strategy | Passive | Active |
| Provider | iShares | State Street Investment Management |
| Benchmark | Bloomberg U.S. MBS Index | - |
| N° of holdings | 1231 | 23 |
| Asset class | Bonds | - |
| Trailing 12m distribution yield | Join | Join |
| Inception date | March 13, 2007 | February 4, 2021 |
| ESG | No | No |
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Exposure
Countries
MBB
USA
29.07%
Other
70.93%
MBND
USA
28.34%
Other
71.66%
Sectors
MBB
Industrials
20.93%
Non-Corporate
7.91%
Other
71.16%
MBND
Municipal
28.34%
Other
71.66%
Diversification
MBB
Total weight of top 15 holdings out of 15
16.01%
MBND
Total weight of top 15 holdings out of 15
36.72%
Top 15 holdings
Data as of July 31, 2026
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%
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%
Frequently asked questions about MBB and MBND
How have the MBB and MBND ETFs performed in 2026?
As of September 11, 2026, MBB is down -1.34% year-to-date (YTD), while MBND has lost -1.63%. That puts MBB better performer ahead so far this year.
Which ETF is attracting more investor money: MBB or MBND?
Year-to-date, the MBB ETF saw +$1.52B in flows, compared to - for MBND.
Which ETF is more volatile: MBB or MBND?
Over the past year, MBB had a volatility of 4.22%, while MBND experienced 2.24%.
Which ETF is bigger: MBB or MBND?
As of September 11, 2026, MBB holds $38.92 B in assets under management (AUM), while MBND manages $26.46 M.
What sectors do the MBB and MBND ETFs invest in?
MBB leans toward sectors like Industrials and Non-Corporate. Meanwhile, MBND focuses on Municipal.
What are the top holdings of the MBB ETF and MBND ETF?
MBB top holdings include BlackRock Cash Funds - Institutional, FR SD8146, 2% 1may2051, USD (ABS) and US21H0526861. MBND holds in its top three: US040664NJ98, US91756SAR40 and US64971PKD68.
Which ETF is more diversified: MBB or MBND?
MBB holds 9388 securities with 16.01% of its assets in the top 15. MBND has 73 securities and a top 15 weight of 36.72%.
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Latest news about MBB & MBND
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