iShares MBS ETF (MBB)
Market Price (5/22/2026): $93.9
iShares MBS ETF (MBB)
Market Price (5/22/2026): $93.9
Asset Allocation with MBB
Top 20 Holdings for MBB
Total Weights Top 5: 12.0% | Top 10: 14.9% | Top 20: 18.9%
| Holding | Weight | |
|---|---|---|
| BLACKROCK CASH CL INST SL AGENCY | 5.40% | |
| USD CASH | 4.00% | |
| FHLMC 30YR UMBS SUPER 2.00% 05/01/2051 | 0.97% | |
| GNMA2 30YR TBA(REG C) 5.50% 06/22/2026 | 0.89% | |
| UMBS 30YR TBA(REG A) 5.50% 06/11/2026 | 0.78% | |
| UMBS 30YR TBA(REG A) 5.00% 06/11/2026 | 0.71% | |
| GNMA2 30YR TBA(REG C) 5.00% 06/22/2026 | 0.63% | |
| GNMA2 30YR 5.00% 11/20/2054 | 0.51% | |
| GNMA2 30YR 2.00% 10/20/2051 | 0.50% | |
| GNMA2 30YR 2.00% 12/20/2051 | 0.50% | |
| FNMA 30YR UMBS 2.00% 12/01/2051 | 0.49% | |
| FHLMC 30YR UMBS SUPER 2.00% 04/01/2051 | 0.47% | |
| GNMA2 30YR TBA(REG C) 6.00% 06/22/2026 | 0.43% | |
| GNMA2 30YR 2.50% 07/20/2051 | 0.42% | |
| FNMA 30YR UMBS 2.00% 11/01/2051 | 0.41% | |
| FNMA 30YR UMBS SUPER 2.00% 07/01/2051 | 0.41% | |
| GNMA2 30YR 5.50% 09/20/2053 | 0.39% | |
| GNMA2 30YR 2.00% 03/20/2052 | 0.34% | |
| GNMA2 30YR 2.50% 05/20/2051 | 0.33% | |
| UMBS 30YR TBA(REG A) 6.00% 06/11/2026 | 0.32% |
Price Returns Compared
| 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | Total [1] | |
|---|---|---|---|---|---|---|---|
| Returns | |||||||
| MBB Return | -1% | -12% | 5% | 1% | 8% | -1% | -0% |
| Peers Return | -1% | -12% | 5% | 3% | 8% | -0% | 2% |
| S&P 500 Return | 27% | -19% | 24% | 23% | 16% | 9% | 98% |
Monthly Win Rates [3] | |||||||
| MBB Win Rate | 25% | 25% | 42% | 58% | 83% | 60% | |
| Peers Win Rate | 33% | 25% | 42% | 63% | 75% | 60% | |
| S&P 500 Win Rate | 75% | 42% | 67% | 75% | 67% | 60% | |
Max Drawdowns [4] | |||||||
| MBB Max Drawdown | -2% | -16% | -9% | -4% | -3% | -3% | |
| Peers Max Drawdown | -2% | -16% | -9% | -4% | -3% | -3% | |
| S&P 500 Max Drawdown | -5% | -25% | -10% | -8% | -19% | -9% | |
[1] Cumulative total returns since the beginning of 2021
[2] Peers: VMBS, SPMB, MBS.
[3] Win Rate = % of calendar months in which monthly returns were positive
[4] Max drawdown represents maximum peak-to-trough decline within a year
[5] 2026 data is for the year up to 5/21/2026 (YTD)
Sharpe Ratios Compared
One measure of reward vs. risk is a Sharpe ratio. A higher ratio indicates better risk-adjusted returns. Most funds have Sharpe ratios < 1.0.
Results as of 4302026.How Low Can It Go
| Event | MBB | S&P 500 |
|---|---|---|
| 2022 Inflation Shock & Fed Tightening | ||
| % Loss | -15.9% | -24.5% |
| % Gain to Breakeven | 18.9% | 32.4% |
| Time to Breakeven | 1047 days | 427 days |
In The Past
iShares MBS ETF's stock fell 0.0% during the 2025 US Tariff Shock. Such a loss loss requires a 0.0% gain to breakeven.
Preserve Wealth
Limiting losses and compounding gains is essential to preserving wealth.
Asset Allocation
Actively managed asset allocation strategies protect wealth. Learn more.
In The Past
iShares MBS ETF's stock fell 0.0% during the 2025 US Tariff Shock. Such a loss loss requires a 0.0% gain to breakeven.
Preserve Wealth
Limiting losses and compounding gains is essential to preserving wealth.
Asset Allocation
Actively managed asset allocation strategies protect wealth. Learn more.
Current Dip Buy Opportunities Across ETFs
ETFs currently down 5% or more from trailing 6M peaks.
| Ticker | Name | Dip % | Mkt Price | Price Date | Peak Price | Peak Date | # Days |
|---|---|---|---|---|---|---|---|
| NOBL | ProShares S&P 500 Dividend Aristocrats ETF | -5.9% | 107.32 | 5212026 | 114.03 | 3012026 | 81 |
| JEPI | JPMorgan Equity Premium Income ETF | -5.1% | 56.08 | 5212026 | 59.09 | 3012026 | 81 |
| ARKK | ARK Innovation ETF | -7.9% | 76.62 | 5212026 | 83.21 | 1132026 | 128 |
| URA | Global X Uranium ETF | -21.0% | 48.86 | 5212026 | 61.81 | 1282026 | 113 |
| LIT | Global X Lithium & Battery Tech ETF | -7.9% | 84.38 | 5212026 | 91.62 | 5112026 | 10 |
| CGBL | Capital Group Core Balanced ETF | -6.2% | 34.41 | 5212026 | 36.67 | 2252026 | 85 |
| XLF | State Street Financial Select Sector SPDR ETF | -7.8% | 51.73 | 5212026 | 56.11 | 1062026 | 135 |
| XLV | State Street Health Care Select Sector SPDR ETF | -7.1% | 148.15 | 5212026 | 159.54 | 3012026 | 81 |
| XLE | State Street Energy Select Sector SPDR ETF | -5.5% | 59.13 | 5212026 | 62.56 | 3292026 | 53 |
| XLP | State Street Consumer Staples Select Sector SPDR ETF | -5.4% | 84.66 | 5212026 | 89.51 | 3012026 | 81 |
| XLU | State Street Utilities Select Sector SPDR ETF | -5.1% | 45.00 | 5212026 | 47.40 | 3012026 | 81 |
| XLB | State Street Materials Select Sector SPDR ETF | -6.3% | 50.02 | 5212026 | 53.38 | 2112026 | 99 |
| ITA | iShares U.S. Aerospace & Defense ETF | -10.9% | 223.15 | 5212026 | 250.42 | 3022026 | 80 |
| XOP | State Street SPDR S&P Oil & Gas Exploration & Production ETF | -9.3% | 170.65 | 5212026 | 188.18 | 3292026 | 53 |
| TLT | iShares 20+ Year Treasury Bond ETF | -6.6% | 84.22 | 5212026 | 90.16 | 3012026 | 81 |
| VGLT | Vanguard Long-Term Treasury ETF | -5.7% | 53.91 | 5212026 | 57.20 | 3012026 | 81 |
| SPTL | State Street SPDR Portfolio Long Term Treasury ETF | -6.1% | 25.61 | 5212026 | 27.28 | 3012026 | 81 |
| TLH | iShares 10-20 Year Treasury Bond ETF | -5.7% | 98.34 | 5212026 | 104.25 | 3012026 | 81 |
| EDV | Vanguard World Funds Extended Duration ETF | -9.1% | 62.11 | 5212026 | 68.33 | 3012026 | 81 |
| GSG | iShares GSCI Commodity | -5.8% | 30.01 | 5212026 | 31.85 | 3182026 | 64 |
| GLD | SPDR Gold Trust | -15.9% | 416.99 | 5212026 | 495.90 | 1292026 | 112 |
| IAU | iShares Gold Trust | -15.9% | 85.43 | 5212026 | 101.57 | 1292026 | 112 |
| GLDM | SPDR Gold MiniShares Trust | -15.8% | 89.87 | 5212026 | 106.77 | 1292026 | 112 |
| SGOL | ETFS Physical Swiss Gold Shares | -13.1% | 44.66 | 5212026 | 51.41 | 1292026 | 112 |
| BAR | Direxion Daily Gold Bull 3X Shares | -16.6% | 44.34 | 5212026 | 53.16 | 1292026 | 112 |
| SLV | iShares Silver Trust | -34.2% | 69.45 | 5212026 | 105.60 | 1282026 | 113 |
| SIVR | ETFS Physical Silver Shares Trust ETF | -24.8% | 83.39 | 5212026 | 110.87 | 1282026 | 113 |
| PPLT | ETFS Physical Platinum Shares | -29.3% | 17.84 | 5212026 | 25.23 | 1252026 | 116 |
| CPER | United States Copper Index Fund ETV | -13.9% | 33.33 | 5212026 | 38.71 | 1292026 | 112 |
| PALL | ETFS Physical Palladium Shares | -32.2% | 25.22 | 5212026 | 37.18 | 1282026 | 113 |
| USO | United States Oil Fund LP | -6.8% | 142.54 | 5212026 | 152.96 | 5192026 | 2 |
| UNG | United States Natural Gas Fund LP | -33.0% | 11.33 | 5212026 | 16.90 | 2012026 | 109 |
| BNO | United States Brent Oil Fund LP ETV | -7.1% | 55.85 | 5212026 | 60.13 | 5042026 | 17 |
| IBIT | iShares Bitcoin Trust ETF | -20.6% | 44.00 | 5212026 | 55.44 | 1142026 | 127 |
| FBTC | Fidelity Wise Origin Bitcoin Fund | -20.6% | 67.56 | 5212026 | 85.12 | 1142026 | 127 |
| GBTC | Grayscale Bitcoin Trust ETF | -19.0% | 61.84 | 5212026 | 76.31 | 1142026 | 127 |
| ETHA | iShares Ethereum Trust ETF | -36.9% | 16.15 | 5212026 | 25.59 | 1142026 | 127 |
About MBB
| Holdings Count: 11Expense Ratio: 0.04%Inception Date: 2007-03-13 | iShares MBS ETFThe iShares MBS ETF (MBB) seeks to track the investment results of an index composed of investment-grade mortgage-backed pass-through securities issued and/or guaranteed by U.S. government agencies.Asset Class: Fixed Income | ETF Website |
Research & Analysis
Invest in Strategies
Wealth Management
External Quote Links
| Y Finance | Barrons |
| TradingView | Morningstar |
| SeekingAlpha | ValueLine |
| Motley Fool | Robinhood |
| CNBC | Etrade |
| MarketWatch | Unusual Whales |
| YCharts | Perplexity Finance |
| FinViz |
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