---
ticker: "SPMB"
name: "State Street SPDR Portfolio Mortgage Backed Bond ETF"
url: "https://etf.net/etf/SPMB"
grade: "A"
score: 71
graded_at: "2026-10-12"
category: "Mortgage-Backed Securities"
category_rank: "1 of 25"
methodology: "https://etf.net/methodology"
---

# SPMB: State Street SPDR Portfolio Mortgage Backed Bond ETF

Grade **A**, Score 71 of 100. Rank 1 of 25 in Mortgage-Backed Securities.

Graded Oct 12, 2026.

## Grade pillars

| Pillar | Score | Category rank |
| --- | --- | --- |
| Cost | 94 | 1 of 25 |
| Mission | 53 | 8 of 20 |
| Risk | 31 | 21 of 25 |
| Tradability | 94 | 1 of 25 |
| Holdings | 75 | 7 of 25 |
| Durability | 85 | 3 of 25 |

## Top holdings

The fund holds 2758 positions. These are the largest 30, by weight.

| # | Ticker | Name | Weight |
| --- | --- | --- | --- |
| 1 | — | Ssi Us Gov Money Market Class | 5.61% |
| 2 | — | Fed Hm Ln Pc Pool RQ0094 Fr 02/56 Fixed 5 | 1.08% |
| 3 | — | Fed Hm Ln Pc Pool RQ0118 Fr 05/56 Fixed 5 | 0.97% |
| 4 | — | Fnma Tba 30 Yr 5.5 Single Family Mortgage | 0.96% |
| 5 | — | Fnma Pool MA4547 Fn 02/52 Fixed 2 | 0.72% |
| 6 | — | Fed Hm Ln Pc Pool RQ0041 Fr 08/55 Fixed 6 | 0.69% |
| 7 | — | Fed Hm Ln Pc Pool SD8212 Fr 05/52 Fixed 2.5 | 0.56% |
| 8 | — | Fed Hm Ln Pc Pool SD8475 Fr 11/54 Fixed 5.5 | 0.50% |
| 9 | — | Gnma Ii Pool MB0424 G2 06/55 Fixed 5.5 | 0.50% |
| 10 | — | Gnma Ii Pool MB0871 G2 01/56 Fixed 5 | 0.47% |
| 11 | — | Fnma Pool MA4701 Fn 08/52 Fixed 4.5 | 0.46% |
| 12 | — | Fnma Pool FA0608 Fn 02/55 Fixed Var | 0.45% |
| 13 | — | Fnma Pool MA4465 Fn 11/51 Fixed 2 | 0.43% |
| 14 | — | Fed Hm Ln Pc Pool SD8193 Fr 02/52 Fixed 2 | 0.41% |
| 15 | — | Fnma Pool FS2040 Fn 02/52 Fixed Var | 0.40% |
| 16 | — | Fnma Pool MA6240 Fn 11/56 Fixed 5.5 | 0.40% |
| 17 | — | Fed Hm Ln Pc Pool SD8408 Fr 03/54 Fixed 5.5 | 0.40% |
| 18 | — | Fed Hm Ln Pc Pool SD8177 Fr 11/51 Fixed 2 | 0.39% |
| 19 | — | Fed Hm Ln Pc Pool RQ0137 Fr 07/56 Fixed 5.5 | 0.39% |
| 20 | — | Gnma Ii Pool MB1216 G2 06/56 Fixed 5 | 0.39% |
| 21 | — | Fnma Tba 30 Yr 6 Single Family Mortgage | 0.38% |
| 22 | — | Fed Hm Ln Pc Pool RQ0056 Fr 10/55 Fixed 5.5 | 0.38% |
| 23 | — | Fed Hm Ln Pc Pool SD8167 Fr 09/51 Fixed 2.5 | 0.37% |
| 24 | — | Gnma Ii Pool MB1343 G2 08/56 Fixed 5 | 0.35% |
| 25 | — | Fed Hm Ln Pc Pool SD8454 Fr 08/54 Fixed 6 | 0.34% |
| 26 | — | Fnma Pool CC0119 Fn 03/55 Fixed 6 | 0.34% |
| 27 | — | Fnma Pool MA4437 Fn 10/51 Fixed 2 | 0.34% |
| 28 | — | Fed Hm Ln Pc Pool RQ0040 Fr 08/55 Fixed 5.5 | 0.33% |
| 29 | — | Gnma Ii Pool MB0365 G2 05/55 Fixed 5 | 0.33% |
| 30 | — | Fed Hm Ln Pc Pool SL2071 Fr 03/55 Fixed 6 | 0.33% |

Source: etf.net, https://etf.net/etf/SPMB. Please cite the page URL.