iShares MBS ETF
MBB NASDAQ
The 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.
Hover to inspectDrag to measure a move← → to step through days
- Fund size
- 23.8B as of Feb 2020
- Expense ratio
- 0.09% per year
- Dividend yield
- 4.52% Monthly
- Volatility · 1Y
- 4.8% Above Average
- Beta
- 0.10 vs the market
- 52-week range
- 89.0994.14
How MBB has paid off
Price return over every period, and total return with dividends reinvested, set against its benchmark.
Return by period
Price · to Oct 13Total return vs benchmark
Total Market US Cap Weighted 1200 IndexOver 1 year, MBB returned +2.8% with dividends reinvested — −50.9 pts behind its benchmark.
How bumpy is the ride?
Return only means something next to the risk taken to earn it. Volatility, drawdowns and market sensitivity over 1 year.
Volatility
Annualized · 1YA typical year sees the price swing about ±5% around its trend.
Drawdown from peak
How far below its previous high the price has been Deepest fall −5.4% on Oct 5, 2026 — 220 days after the previous high
More than 5% below a high 3% of the time.
Risk vs reward
1YOver 1 year, MBB delivered less return, with less risk than its benchmark.
Market sensitivity
BetaA beta of 0.10 means MBB has moved less than the market.
Trend & momentum
Where the price sits against its moving averages, and how stretched the recent move is.
Price vs moving averages
Downtrend- 12-day average89.75 +0.2%
- 26-day average90.24 −0.3%
- 50-day average90.92 −1.0%
- 200-day average91.65 −1.8%
The price is above 1 of 4 averages. The 50-day average is below the 200-day, a sign of a falling longer-term trend.
Relative strength (RSI)
NeutralRSI compares recent gains with recent losses on a 0–100 scale. Above 70 a move is often considered stretched, below 30 washed out.
Technical indicators describe past prices. They are not a forecast.
Inside the fund
Mortgage-Backed Securities · U.S. Agency Backed — tracking the Bloomberg Barclays US Mortgage Backed Securities Index.
- Assets under management23.8BUSD
- Expense ratio0.09%per year
- Holdings9,058
- Risk score2.0Low
Launched March 2007. Listed options available. Fund data as of Feb 28, 2020.
What it pays you
Cash distributions over the last twelve months, and how they have grown.
About 45 USD a year for every 1,000 USD invested at today's price.
- Per share
- 4.07
- Frequency
- Monthly
- Last paid
- Oct 1, 2026
Last 12 months
4.07 USD / shareWhere MBB shows up
Curated themes and indices that hold MBB. Open one to see it in context, or test the whole theme in a portfolio.
About iShares MBS ETF
The 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.
- Featured in 2 curated themes
- 9,058 holdings
- Ticker
- MBB
- Exchange
- NASDAQ
- ISIN
- US4642885887
- CUSIP
- 464288588
- Currency
- U.S. Dollar (USD)
- Country
- USA
- Sector
- Mortgage-Backed Securities
- Industry
- U.S. Agency Backed
- Benchmark
- Total Market US Cap Weighted 1200 Index
All key statistics
Details
Shareas of Oct 13, 2026
Dataas of Feb 28, 2020
Put MBB to the test
See how it would change the return and the risk of a portfolio, with virtual money, before a single real dollar moves.
Data for information only, not investment advice. Past performance does not guarantee future results.