PGSBX Performance — Putnam Mortgage Securities Fund, CL B
Data updated: 2026-08-27
PGSBX returned +12.90% over one year to Sep 2024. Over one year the fund beat its Ultrashort Securitized Bond category average: $100 grew to $113, against $108 for the category. Volatility over the past 12 months was 7.79% a year. In the 12 months to Jun 2026 the fund lost a net $53.8M, and assets reached $373.72M.
PGSBX Growth of $100
What $100 invested in Putnam Mortgage Securities Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Ultrashort Securitized Bond category average over the same months.
| Period | PGSBX | Category average |
|---|---|---|
| 1 year (Sep 2023 – Sep 2024) | $113 | $108 |
| 3 years (Sep 2021 – Sep 2024) | $92 | $109 |
| 5 years (Sep 2019 – Sep 2024) | $92 | $113 |
| Since data start (Jul 2019 – Sep 2024) | $94 | $114 |
PGSBX Trailing Returns
Total returns to Sep 2024, from SEC N-PORT.
| Period | Total return |
|---|---|
| 1 year | +12.90% |
3- and 5-year figures withheld: disagrees with sibling classes.
PGSBX Annual Returns
Calendar-year total returns of Putnam Mortgage Securities Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2024 (Jan–Sep) | +5.03% |
| 2023 | +2.82% |
| 2022 | −11.48% |
| 2021 | −4.99% |
| 2020 | −1.43% |
| 2019 (Jul–Dec) | +4.90% |
PGSBX 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | +1.2% | −1.2% | +0.8% | +1.3% | +1.8% | −2.0% | — | +0.7% | +2.5% | — | — | — |
| 2023 | −0.1% | −2.5% | +2.3% | +0.2% | −0.6% | +0.5% | −3.3% | −0.8% | +0.3% | +4.8% | +4.7% | −2.2% |
| 2022 | −3.1% | −1.6% | +1.3% | −1.9% | +0.5% | −2.8% | −6.5% | −3.0% | +3.3% | +0.1% | +4.2% | −2.1% |
| 2021 | −0.8% | +0.7% | +1.6% | −1.1% | −1.6% | −0.4% | −0.1% | 0.0% | −0.6% | −0.8% | −1.3% | −0.7% |
| 2020 | −10.6% | +0.9% | +0.9% | +2.7% | +0.9% | −0.1% | +0.1% | +1.2% | −0.9% | +1.6% | +1.8% | +0.8% |
| 2019 | — | — | — | — | — | — | +0.7% | +1.1% | +1.1% | +0.4% | +1.2% | +0.3% |
PGSBX Risk
Risk measures from monthly returns over Sep 2023 – Sep 2024.
- 1-year volatility (annualised): 7.79%
- Best month: +4.79% (Oct 2023)
- Worst month: −2.24% (Dec 2023)
PGSBX Fund Flows
Monthly money in and out of Putnam Mortgage Securities Fund, from SEC Form N-PORT.
- 12-month net flow: −$53.8M
- 12-month gross sales (incl. reinvestments): $43.3M
- Sales ÷ redemptions: 0.45×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $3.9M | $7.6M | −$3.7M |
| May 2026 | $623K | $5.7M | −$5.0M |
| Apr 2026 | $3.0M | $10.8M | −$7.7M |
| Mar 2026 | $5.5M | $5.7M | −$212K |
| Feb 2026 | $2.3M | $4.5M | −$2.2M |
| Jan 2026 | $4.1M | $6.7M | −$2.6M |
| Dec 2025 | $4.5M | $6.4M | −$1.9M |
| Nov 2025 | $3.4M | $7.5M | −$4.1M |
| Oct 2025 | $4.0M | $18.8M | −$14.8M |
| Sep 2025 | $5.6M | $6.7M | −$1.0M |
| Aug 2025 | $2.5M | $8.2M | −$5.7M |
| Jul 2025 | $3.9M | $8.6M | −$4.7M |
PGSBX Assets Under Management
Net assets of Putnam Mortgage Securities Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $373.72M |
| 2026-03-31 | $386.60M |
| 2025-12-31 | $390.00M |
| 2025-09-30 | $409.48M |
| 2025-06-30 | $416.91M |
| 2025-03-31 | $432.19M |
| 2024-12-31 | $408.98M |
| 2024-09-30 | $434.22M |
| 2024-06-30 | $424.18M |
| 2024-03-31 | $420.54M |
| 2023-12-31 | $426.61M |
| 2023-09-30 | $411.65M |
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.