SPMB Performance — State Street(R) SPDR(R) Portfolio Mortgage Backed Bond ETF
Data updated: 2026-09-11
SPMB returned +1.07% year to date and +5.17% over one year to Jun 2026. Annualised returns are +4.55% over 3 years and +0.43% over 5 years. Against its Intermediate Securitized Bond category average the fund came out behind over three years but ahead over one: $100 invested three years ago grew to $114, against $116 for the category, and to $105 over one year, against $105. Volatility over the past three years was 6.40% a year. In the 12 months to Jun 2026 the fund took in a net $857.0M, and assets reached $7.07B.
SPMB Growth of $100
What $100 invested in State Street(R) SPDR(R) Portfolio Mortgage Backed Bond ETF grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Intermediate Securitized Bond category average over the same months.
| Period | SPMB | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $105 | $105 |
| 3 years (Jul 2023 – Jun 2026) | $114 | $116 |
| 5 years (Jul 2021 – Jun 2026) | $102 | $105 |
| Since data start (Jul 2019 – Jun 2026) | $107 | $113 |
SPMB Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +1.07% |
| 1 year | +5.17% |
| 3 years (annualised) | +4.55% |
| 5 years (annualised) | +0.43% |
SPMB Annual Returns
Calendar-year total returns of State Street(R) SPDR(R) Portfolio Mortgage Backed Bond ETF, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +1.07% |
| 2025 | +8.42% |
| 2024 | +1.24% |
| 2023 | +5.07% |
| 2022 | −11.99% |
| 2021 | −1.50% |
| 2020 | +4.14% |
| 2019 (Jul–Dec) | +1.98% |
SPMB Monthly Returns
Monthly total returns as reported on SEC Form N-PORT.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +0.5% | +1.7% | −1.7% | +0.1% | +0.3% | +0.2% | — | — | — | — | — | — |
| 2025 | +0.5% | +2.5% | 0.0% | +0.3% | −0.9% | +1.8% | −0.4% | +1.6% | +1.2% | +0.9% | +0.6% | +0.1% |
| 2024 | −0.4% | −1.6% | +1.0% | −3.0% | +2.0% | +1.2% | +2.6% | +1.6% | +1.2% | −2.8% | +1.4% | −1.7% |
| 2023 | +3.4% | −2.6% | +1.9% | +0.5% | −0.7% | −0.4% | −0.1% | −0.8% | −3.2% | −2.1% | +5.2% | +4.3% |
| 2022 | −1.6% | −1.0% | −2.6% | −3.5% | +1.1% | −1.6% | +3.2% | −3.4% | −5.1% | −1.4% | +4.1% | −0.6% |
| 2021 | +0.1% | −0.8% | −0.7% | +0.6% | −0.3% | 0.0% | +0.7% | −0.2% | −0.4% | −0.2% | −0.1% | −0.1% |
| 2020 | +0.7% | +1.1% | +0.9% | +0.9% | +0.1% | −0.1% | +0.3% | 0.0% | −0.1% | 0.0% | +0.1% | +0.2% |
| 2019 | — | — | — | — | — | — | +0.4% | +0.9% | +0.1% | +0.3% | 0.0% | +0.3% |
SPMB Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 6.40%
- 3-year Sharpe ratio: 0.01 (vs 4.5% risk-free rate)
- Best month: +5.23% (Nov 2023)
- Worst month: −3.19% (Sep 2023)
SPMB Fund Flows
Monthly money in and out of State Street(R) SPDR(R) Portfolio Mortgage Backed Bond ETF, from SEC Form N-PORT.
- 12-month net flow: $857.0M
- 12-month gross sales (incl. reinvestments): $957.7M
- Sales ÷ redemptions: 9.51×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $124.6M | $0 | $124.6M |
| May 2026 | $91.3M | $38.0M | $53.4M |
| Apr 2026 | $44.9M | $26.9M | $18.0M |
| Mar 2026 | $80.8M | $0 | $80.8M |
| Feb 2026 | $117.3M | $0 | $117.3M |
| Jan 2026 | $69.7M | $0 | $69.7M |
| Dec 2025 | $136.8M | $0 | $136.8M |
| Nov 2025 | $49.5M | $0 | $49.5M |
| Oct 2025 | $92.4M | $0 | $92.4M |
| Sep 2025 | $53.9M | $35.9M | $18.0M |
| Aug 2025 | $11.1M | $0 | $11.1M |
| Jul 2025 | $85.5M | $0 | $85.5M |
SPMB Assets Under Management
Net assets of State Street(R) SPDR(R) Portfolio Mortgage Backed Bond ETF by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $7.07B |
| 2026-03-31 | $6.90B |
| 2025-12-31 | $6.65B |
| 2025-09-30 | $6.37B |
| 2025-06-30 | $6.16B |
| 2025-03-31 | $5.95B |
| 2024-12-31 | $5.61B |
| 2024-09-30 | $5.56B |
| 2024-06-30 | $5.16B |
| 2024-03-31 | $5.02B |
| 2023-12-31 | $4.80B |
| 2023-09-30 | $4.34B |
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.