State Street SPDR Portfolio Mortgage Backed Bond ETF
$21.23+0.03 (+0.14%)
- 0.04%
- $6.8B
- −1.9%
- 4.33%
- 1.4M sh
- $21.20
- low $20.92high $22.87
The ETF.net SPMB Grade
A
Score 71 out of 100
- 1 of 25
Score 71 of 100 falls in the A band. A is 70 or higher, B 55 to under 70, C 40 to under 55, D 25 to under 40, F under 25.
Cost
The fund’s net expense ratio, ranked against its category.A94 out of 100Rank 1 of 25Mission
Whether the fund did what it promised, tested against its stated mandate.C53 out of 100Rank 8 of 20Risk
How the fund held up when markets fell: downside volatility, drawdowns and tail loss.D31 out of 100Rank 21 of 25Tradability
How easy the fund is to trade: daily volume, and how far its price strays from net asset value.A94 out of 100Rank 1 of 25Holdings
How concentrated the fund is, and how complete and current its disclosed holdings are.A75 out of 100Rank 7 of 25Durability
Whether the fund is likely to stay open, judged by its age, its assets and its issuer’s assets.A85 out of 100Rank 3 of 25
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
- 2,758
- 12%
- 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.
SPMB$9,815
Returns run to the Oct 12, 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 | −2.7% |
| 1 month | −1.4% |
| 3 months | −3.2% |
| 1 year | −1.9% |
| 3 years | +5.0% |
| 5 years | −0.3% |
| 10 years | +0.8% |
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 | −2.7% | |
| 2025 | +8.3% | |
| 2024 | +1.3% | |
| 2023 | +5.1% | |
| 2022 | −12.1% | |
| 2021 | −1.5% | |
| 2020 | +4.2% |
SPMB in the news
SPMB Dividends
- 4.33%
- $0.92
- $0.07 per share
- Monthly
Distribution history
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.
- 0.01
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.
- −17.0%
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
0.04%
SPMB0.04%
- The middle half of Mortgage-Backed Securities funds
- Median 0.36%
2 of the 24 Mortgage-Backed Securities funds charge less.
Other funds in Mortgage-Backed Securities
- BSMBSSchwab Strategic Trust - Schwab Mortgage-Backed Securities ETFExpense ratio 0.03%1 year return −1.6%
- AMBBiShares MBS ETFExpense ratio 0.04%1 year return −1.6%
- BVMBSVanguard Mortgage-Backed Securities ETFExpense ratio 0.03%1 year return −1.2%
- BJMTGJPMorgan Mortgage-Backed Securities ETFExpense ratio 0.37%1 year return −1.2%
- BMBSDNorthern Trust Disciplined Duration MBS ETFExpense ratio 0.21%1 year return −0.7%