State Street SPDR Portfolio Mortgage Backed Bond ETF
$21.36−0.24 (−1.13%)
- Expense ratio
- 0.04%
- Fund size
- $7.1B
- 1Y return
- +0.5%
- Yield · Last 12 months
- 4.23%
- Holdings
- 2768
- Volume · 30D
- 1.2M sh
- NAV per share
- $21.62
- 52W range
The ETF.net SPMB Grade
Score 71 of 100 sits in the A band. Bands: A ≥ 70, B ≥ 55, C ≥ 40, D ≥ 25, F < 25; the scale skips E.
Cost
What you pay to own it — the expense ratio plus trading frictions, ranked within its category.AScore 94Category rankMission
How faithfully it does the job it claims — tracking its mandate or index with minimal slippage.BScore 55Category rankRisk
How violently it can move — volatility, drawdown depth, and downside capture versus its category.DScore 29Category rankTradability
How cheaply and easily you can get in and out — liquidity, spread, and premium/discount stability.AScore 91Category rankHoldings
What it actually owns — the quality, breadth, and concentration of the underlying portfolio.AScore 73Category rankDurability
Whether it will still be here — the fund’s assets, age, flows, and issuer staying power.AScore 85Category rank
Our read on SPMB
AThe no-frills way to own America's mortgage bonds. SPMB tracks the Bloomberg U.S. MBS Index for four basis points, a fraction of what the typical mortgage-bond ETF charges, and pays income monthly.
The fund seeks to track, before fees and expenses, the price and yield performance of the Bloomberg U.S. MBS Index.
Why people hold it
- Four basis points a year, against a 0.35% median for mortgage-bond ETFs. Cost is where this fund does its loudest talking.
- Runs the same Bloomberg U.S. MBS Index as iShares' MBB at the same 0.04% fee, and undercuts MBBA, which tracks that index for far more.
- Roughly 2,700 mortgage bonds in a single line item, inside a multi-billion-dollar fund that trades actively, with distributions paid monthly.
- Trading since 2009, and one of the strongest implementations in its mortgage-bond peer group.
Worth knowing
- Homeowners refinance when rates fall, so mortgage bonds get paid back early and rally less than Treasuries. That quirk is built into the index, not the fund.
- Prices move with interest rates and the monthly payout floats with the portfolio. This is a bond fund, not a cash substitute.
- US mortgages only. No Treasuries, no corporates, no credit spice. A building block for a bond sleeve rather than the whole sleeve.
SPMB Holdings
- Bonds
- 2,768
- 13%
- SSI US GOV MONEY MARKET CLASS
Geography
- United States100.00%
SPMB Performance
Shows how $10,000 changes over the selected period, with cash distributions reinvested at the closing price on each ex-dividend date.
Returns run to the Sep 22, 2026 close, with cash distributions reinvested. Each period starts on the same date that many months or years earlier. Periods over one year show the average yearly return.
| Period | SPMB |
|---|---|
| Year to date | −1.2% |
| 1 month | −1.3% |
| 3 months | −1.9% |
| 1 year | +0.5% |
| 3 years | +4.7% |
| 5 years | −0.1% |
| 10 years | +1.0% |
Calendar-year total return with cash distributions hypothetically reinvested at the ex-dividend date’s closing price. The current year shows year to date.
| Year | Return bar | SPMB |
|---|---|---|
| 2026 YTD | −1.2% | |
| 2025 | +8.3% | |
| 2024 | +1.3% | |
| 2023 | +5.1% | |
| 2022 | −12.1% | |
| 2021 | −1.5% | |
| 2020 | +4.2% |
SPMB in the news
ETF.net Research hasn’t filed on SPMB yet — coverage lands here as it’s written.
SPMB Dividends
- 4.23%
- $0.91
- $0.07 per share
- Monthly
Distribution history
| Ex-date | Pay date | Amount per share |
|---|---|---|
| Sep 1, 2026 | Sep 4, 2026 | $0.07 |
| Aug 3, 2026 | Aug 6, 2026 | $0.07 |
| Jul 1, 2026 | Jul 7, 2026 | $0.07 |
| Jun 1, 2026 | Jun 4, 2026 | $0.07 |
| May 1, 2026 | May 6, 2026 | $0.07 |
| Apr 1, 2026 | Apr 6, 2026 | $0.07 |
| Mar 2, 2026 | Mar 5, 2026 | $0.07 |
| Feb 2, 2026 | Feb 5, 2026 | $0.07 |
| Dec 18, 2025 | Dec 23, 2025 | $0.14 |
| Dec 1, 2025 | Dec 4, 2025 | $0.07 |
| Nov 3, 2025 | Nov 6, 2025 | $0.07 |
| Oct 1, 2025 | Oct 6, 2025 | $0.07 |
SPMB Risk
- 6.5%
How it’s calculated: standard deviation
The sample standard deviation of monthly total returns, multiplied by the square root of 12.
Uses up to 36 complete months, with at least 12 required. Total returns include reinvested distributions.
- 0.02
How it’s calculated: Sharpe ratio
Subtract each month’s Treasury-bill return from the fund’s monthly total return.
Divide the average of those excess returns by their sample standard deviation, then multiply by the square root of 12.
Uses up to 36 complete months, with at least 12 required. Each month uses the Treasury yield quoted at the end of the previous month.
- −17.1%
How it’s calculated: maximum drawdown
The largest percentage decline from an earlier peak, using total returns with reinvested distributions.
Uses up to five years through the last close, with at least 12 months required.
- 1.15
How it’s calculated: beta
The beta figure is supplied by FMP. The comparison index depends on the fund’s broad asset class.
SPMB Cost
- The middle half of Mortgage-Backed Securities funds
- Median 0.32%
2 of the 24 Mortgage-Backed Securities funds charge less.