State Street SPDR Portfolio Mortgage Backed Bond Index ETF Annual Total Returns |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| State Street SPDR Portfolio Mortgage Backed Bond Index ETF | State Street SPDR Portfolio Mortgage Backed Bond Index ETF | ||||||||||
| Prospectus [Line Items] | ||||||||||
| Annual Return [Percent] | 8.40% | 1.25% | 5.07% | (11.99%) | (1.51%) | 4.14% | 6.23% | 0.88% | 2.21% | 1.29% |