State Street SPDR Portfolio Mortgage Backed Bond ETF
$21.64+0.01 (+0.07%)
- 0.04%
- $7B
- +0.3%
- 4.23%
- 1.62M sh
- low $20.92high $22.87
The ETF.net SPMB Grade
A
Score 75 out of 100
- 1 of 25
Score 75 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.B64 out of 100Rank 3 of 21Risk
How the fund held up when markets fell: downside volatility, drawdowns and tail loss.D34 out of 100Rank 19 of 25Tradability
How easy the fund is to trade: daily volume, and how far its price strays from net asset value.A95 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.A83 out of 100Rank 3 of 25
Our read on SPMB
In short
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.
Stated mandate
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
Worth knowing
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$10,029
Returns run to the Oct 30, 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 | −0.4% |
| 1 month | +3.0% |
| 3 months | 0.0% |
| 1 year | +0.3% |
| 3 years | +6.3% |
| 5 years | +0.2% |
| 10 years | +1.1% |
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 | −0.4% | |
| 2025 | +8.3% | |
| 2024 | +1.3% | |
| 2023 | +5.1% | |
| 2022 | −12.1% | |
| 2021 | −1.5% | |
| 2020 | +4.2% |
SPMB in the news
SPMB Dividends
- 4.23%
- $0.92
- $0.07 per share
- Monthly
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.
- 0.28
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.
FMP measures it over up to five years of monthly returns.
SPMB Cost
Overpaying vs VMBS, tied cheapest in Mortgage-Backed Securities
$211
On $10,000 over 30 years. 7% growth a year before fees, expense ratio only.
SPMB 0.04%
$849
VMBS 0.03% Tied cheapest
$638
Cost over time
Year by year
| Year | SPMB | VMBS | Overpaying |
|---|---|---|---|
| 10 | $73 | $55 | $18 |
| 20 | $288 | $216 | $72 |
| 30 | $849 | $638 | $211 |
Other funds in Mortgage-Backed Securities
- AMBBiShares MBS ETFExpense ratio 0.04%1 year return +0.6%
- AVMBSVanguard Mortgage-Backed Securities ETFExpense ratio 0.03%1 year return +0.9%
- ASMBSSchwab Mortgage-Backed Securities ETFExpense ratio 0.03%1 year return +0.3%
- BJMTGJPMorgan Mortgage-Backed Securities ETFExpense ratio 0.37%1 year return +0.8%
- BMBSDNorthern Trust Disciplined Duration MBS ETFExpense ratio 0.20%1 year return +0.6%
