BlackRock Mortgage-Backed Securities Fund
The investment seeks to maximize total return, consistent with income generation and prudent investment management. Under normal circumstances, the fund invests at least 80% of its assets in Government National Mortgage Association ("GNMA") securities. It invests primarily in securities issued by GNMA as well as other U.S. government securities. Securities purchased by the fund are rated in the highest rating category (AAA or Aaa) at the time of purchase by at least one major rating agency or are determined by the fund management team to be of similar quality.
The investment seeks to maximize total return, consistent with income generation and prudent investment management. Under normal circumstances, the fund invests at least 80% of its assets in Government National Mortgage Association ("GNMA") securities. It invests primarily in securities issued by GNMA as well as other U.S. government securities. Securities purchased by the fund are rated in the highest rating category (AAA or Aaa) at the time of purchase by at least one major rating agency or are determined by the fund management team to be of similar quality.
MethodologyExpense ratio and its components from market data (10/7/2026). Yield as of 10/7/2026, AUM 9/30/2026. Holdings, asset class, style, peer group and exposures as of 12/31/2025. Summary may be from an older prospectus.
None of the selected metrics are scored for BGPSX — switch the picker to All, or add metrics under Metrics (top right).
Hover or click for factor definitions. Weighted average of underlying company-level values with weights equal to position size. Solid blue dots mark the fund's position within the clean equity fund universe (5th–95th percentile scale); the shaded band spans the fund's broad class (Fixed Income Funds) 25th–75th percentile, notched at the median. Holdings as of 12/31/2025. Stock-level data as of 8/31/2026. Expense ratio, yield, and turnover as of 10/7/2026. AUM as of 9/30/2026.
Shares of the fund's long book, from the asset category each position is filed under. The long book is 187% of net assets, so shares are of the long book rather than of the fund - it is levered by 87%. The short book is stated under the card and never netted into a slice: a pie cannot draw a negative, and folding a hedge into the class it offsets would make it look like more of that class.
Based on holdings that carry a country (76% of total assets).
Shares are percentages of the holdings that carry a country, not portfolio weights. Based on N-PORT domicile; ADRs list under their exchange. Holdings as of 12/31/2025. Stock-level data as of 8/31/2026.
560 positions (top 10 shown, create for full holdings)
| # | Name | Weight % | Country |
|---|---|---|---|
| 1 | Federal National Mortgage Association or Federal Home Loan Mortgage | 15.14 | USA |
| 2 | Federal National Mortgage Association or Federal Home Loan Mortgage | 12.08 | USA |
| 3 | Federal National Mortgage Association or Federal Home Loan Mortgage | 10.54 | USA |
| 4 | Federal National Mortgage Association or Federal Home Loan Mortgage | 10.47 | USA |
| 5 | Government National Mortgage Association | 6.34 | USA |
| 6 | Federal National Mortgage Association or Federal Home Loan Mortgage | 4.88 | USA |
| 7 | Government National Mortgage Association | 4.66 | USA |
| 8 | Government National Mortgage Association | 4.04 | USA |
| 9 | Federal Home Loan Mortgage | 3.96 | USA |
| 10 | Federal National Mortgage Association or Federal Home Loan Mortgage | 3.92 | USA |
Sector, country and factor detail need a security match; the share of weight that matched is a member figure, so the rows without one appear here with those columns blank. Holdings as of 12/31/2025. Stock-level data as of 8/31/2026.
Hover or click for definitions. Solid blue dots mark the fund: percentage rows on a 0–100% scale, holdings counts log-scaled across the clean-universe 5th–95th percentile range. The shaded band spans the fund's broad class (Fixed Income Funds) 25th–75th percentile, notched at the median. Holdings as of 12/31/2025.
Metric | BGPSX BlackRock Mortgage-Backed Securities Fund | Peer Group 93 funds | Peer Asset Class 2,838 funds |
|---|---|---|---|
YTD Return | - | - | - |
1Y Return | - | - | - |
3Y Return (Ann.) | - | - | - |
5Y Return (Ann.) | - | - | - |
Expense Ratiohigher = cheaper | 0.73% | 0.41%17 | 0.52%32 |
Sparkline's own holdings-based peer taxonomy (195 share classes across 93 funds). One share class shown per fund — the exchange-listed class where the SEC series has one, else its longest-history class; percentile ranks and medians are computed against the same deduped set. Quartile chips fill the layer the fund's rank falls in (top layer = best quartile). Funds without a full return history rank only on the horizons they cover.
Nearest funds across the whole universe, by holdings and behavior — the peer taxonomy is ignored, so matches can come from any category.
| Fund | Peer Group | ||||
|---|---|---|---|---|---|
| 1 | MBBA iShares Mortgage-Backed Securities Active ETF Fixed Income - Securitized/MBS | Fixed Income - Securitized/MBS | 88 | - | - |
| 2 | BKT BlackRock Income Trust, Inc. Fixed Income - Core | Fixed Income - Core | 16 | - | - |
| 3 | BRAMX BATS: Mortgage Total Return Series Fixed Income - Securitized/MBS | Fixed Income - Securitized/MBS | 14 | - | - |
| 4 | BATAX BATS: Securitized Total Return Series Fixed Income - Securitized/MBS | Fixed Income - Securitized/MBS | 5 | - | - |
| 5 | SECU iShares Securitized Income Active ETF Fixed Income - Securitized/MBS | Fixed Income - Securitized/MBS | 4 | - | - |
| 6 | BLADX BlackRock Managed Income Fund Allocation - Conservative | Allocation - Conservative | 3 | - | - |
| 7 | BCBAX BlackRock Core Bond Portfolio Fixed Income - Core | Fixed Income - Core | 3 | - | - |
| 8 | MAHQX BlackRock Total Return Fund Fixed Income - Core | Fixed Income - Core | 2 | - | - |
| 9 | BLDAX BlackRock Low Duration Bond Portfolio Fixed Income - Short-Term | Fixed Income - Short-Term | 2 | - | - |
| 10 | BRTR iShares Total Return Active ETF Fixed Income - Core | Fixed Income - Core | 2 | - | - |
The method columns are members-only — create a free account to see these figures.
MethodologyRows are the consensus top matches (a fund must place in at least two methods' top 250 to qualify, and matches missing more than one of this fund's own methods are not ranked — a row scored on fewer methods is a noisier estimate, not a better match). Click a method column to see that method's own top matches across the whole universe instead. Gray (N) beside each method's metric is that fund's rank in the whole universe on that method. Similarity is a percentile among match-grade fund pairs, 0–100 — 87 means the pair is closer than 87% of the strongest matches in the universe, averaged across the methods — so it compares across funds: index clones tie at the top with thousands of other clone pairs, so scores top out in the high 80s to 90s, while a one-of-a-kind fund's best match can score in the 30s. Rows are ordered by the Consensus Rank — the geometric mean of those universe ranks, shown in each cell's tooltip — and the score is held down the list to the level of the closest match above it, so equal scores mean equally close and the number reads as a floor. A dash means that method has no figure for the pair at all (one of them lacks the holdings or return history it needs). Hover a column header for each method's definition. The “Top…” strips above compare against every fund's own top match across the whole universe (they deliberately don't follow the Peer Universe selector); Top Similarity is simply the best match's score, with no reference band; the Holdings and Active Tilt strips carry no reference band because computing every fund's best book overlap would require a full holdings scan per fund — the dot stands alone on its natural 0–100% scale. One share class shown per fund, and a fund's own sister share classes are excluded from its Top-match strips. Holdings as of 12/31/2025. Consensus Rank is the geometric mean of the match's universe-wide rank across the methods (#1.0 = top match on every one). Holdings Overlap = common-holdings weight (sum of the minimum weight across shared positions, long only). Active Tilt Overlap = the same statistic on active weights (holdings minus the fund's own default benchmark, floored at 0), which strips the benchmark ballast that dominates raw overlap.