MBBvsMMSDETF Comparison
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iShares MBS ETF (MBB) belongs to the MBS & ABS segment. NYLI MacKay Muni Short Duration ETF (MMSD) is part of the Municipal Bonds segment. MBB's top 3 sector exposures are Industrials, Non-Corporate and Finance. In contrast, MMSD's top sector exposures are Municipal, Healthcare and Industrials. MBB is less expensive with a Total Expense Ratio (TER) of 0.04%, versus 0.44% for MMSD. MBB is down -1.34% year-to-date (YTD) with +$1.52B in YTD flows. MMSD performs better with 0.92% YTD performance, and +$28M in YTD flows. Run a side-by-side ETF comparison of MBB and MMSD 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 MMSD 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 MMSD | -1.48%-0.66% | -2.24%-0.32% | -1.34%+0.92% | -0.12%+1.42% | +13.76%n/a | -0.62%n/a |
| Flows | MBB MMSD | +$655M+$6M | +$892M+$15M | +$1.52B+$28M | -$888M+$56M | +$12.43B- | +$17.94B- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | MBB MMSD | +4.76%+1.32% | +4.22%+1.13% | +5.85%n/a | +6.60%n/a |
| Max drawdown | MBB MMSD | -2.79%-0.83% | -3.37%-1.25% | -5.44%n/a | -17.29%n/a |
| Max drawdown duration | MBB MMSD | 74d16d | 194d114d | 75dn/a | 1492dn/a |
Trading data
MBB | MMSD | |
Last sale 9/11/2026 at 1:30 PM | $91.38 | $25.02 |
| Previous close 09/10/2026 | $91.48 | $24.99 |
| 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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MMSD
is actively managed and doesn’t replicate an indexMBB | MMSD | |
|---|---|---|
| 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 | MMSD | |
|---|---|---|
| Last price | $91.38 | $25.02 |
| 1D performance | -0.11% | +0.10% |
| AuM | $38.92 B | $83.83 M |
| E/R | 0.04% | 0.44% |
Characteristics
MBB | MMSD | |
|---|---|---|
| Management strategy | Passive | Active |
| Provider | iShares | New York Life Investments |
| Benchmark | Bloomberg U.S. MBS Index | - |
| N° of holdings | 1231 | 41 |
| Asset class | Bonds | - |
| Trailing 12m distribution yield | Join | Join |
| Inception date | March 13, 2007 | May 5, 2025 |
| ESG | No | No |
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Exposure
Countries
MBB
USA
29.07%
Other
70.93%
MMSD
USA
24.97%
Other
75.03%
Sectors
MBB
Industrials
20.93%
Non-Corporate
7.91%
Other
71.16%
MMSD
Municipal
22.59%
Other
77.41%
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Diversification
MBB
Total weight of top 15 holdings out of 15
16.01%
MMSD
Total weight of top 15 holdings out of 15
19.67%
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%
MMSD
US708692BV94
1.85%
US72342NAF24
1.51%
US118217CN67
1.32%
US84136HCT86
1.31%
US19648FJ393
1.29%
Black Belt Energy Gas District, 5% 1jun2031, USD (2026)
1.29%
Main Street Natural Gas Inc., 5% 1may2054, USD (2023D)
1.28%
US63609YAA64
1.24%
New York Housing Development Corp., 5.458% 15dec2031, USD (2024, A)
1.24%
US360059AL37
1.23%
US59447UBB52
1.23%
US04785VCD47
1.23%
Arkansas Development Finance Authority, 4% 1sep2046, USD (2026A)
1.23%
San Jose (CA), 3.05% 1may2066, USD (2026A)
1.22%
US87972MCC47
1.22%
Frequently asked questions about MBB and MMSD
How have the MBB and MMSD ETFs performed in 2026?
As of September 11, 2026, MBB is down -1.34% year-to-date (YTD), while MMSD has returned 0.92%. That puts MMSD better performer ahead so far this year.
Which ETF is attracting more investor money: MBB or MMSD?
Year-to-date, the MBB ETF saw +$1.52B in flows, compared to +$28M for MMSD.
Which ETF is more volatile: MBB or MMSD?
Over the past year, MBB had a volatility of 4.22%, while MMSD experienced 1.13%.
Which ETF is bigger: MBB or MMSD?
As of September 11, 2026, MBB holds $38.92 B in assets under management (AUM), while MMSD manages $83.83 M.
What sectors do the MBB and MMSD ETFs invest in?
MBB leans toward sectors like Industrials and Non-Corporate. Meanwhile, MMSD focuses on Municipal.
What are the top holdings of the MBB ETF and MMSD ETF?
MBB top holdings include BlackRock Cash Funds - Institutional, FR SD8146, 2% 1may2051, USD (ABS) and US21H0526861. MMSD holds in its top three: US708692BV94, US72342NAF24 and US118217CN67.
Which ETF is more diversified: MBB or MMSD?
MBB holds 9388 securities with 16.01% of its assets in the top 15. MMSD has 155 securities and a top 15 weight of 19.67%.
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Latest news about MBB & MMSD
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