PUSYX — Putnam Mortgage Securities Fund
Data updated: 2026-05-27
PUSYX — Putnam Mortgage Securities Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Long Securitized (MBS/ABS/CMBS) Bond · $386.60M AUM · 0.67% expense ratio · 7.5% 1-yr return. From SEC regulatory filings.
PUSYX Fund Overview
PUSYX — Putnam Mortgage Securities Fund is a US mutual fund managed by Putnam Mortgage Securities Fund, categorised as Long Securitized (MBS/ABS/CMBS) Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Putnam Mortgage Securities Fund
- Category: Long Securitized (MBS/ABS/CMBS) Bond
- Assets under management: $386.60M
- 1-year return: 7.5%
- Ticker: PUSYX
- SEC CIK: 0000732337
- SEC series ID: S000006570
- Share class ID: C000017927
PUSYX Holdings
Top 10 holdings of Putnam Mortgage Securities Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| FNMA or FHLMC | 28.59% |
| FNMA or FHLMC | 22.15% |
| FNMA or FHLMC | 18.47% |
| FNMA or FHLMC | 15.63% |
| Putnam Short Term Investment Fund | 13.83% |
| FNMA or FHLMC | 9.35% |
| FNMA or FHLMC | 5.91% |
| FNMA or FHLMC | 5.69% |
| FNMA or FHLMC | 4.87% |
| FNMA or FHLMC | 4.28% |
PUSYX Portfolio Allocation
Asset-class allocation of Putnam Mortgage Securities Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Securitized | 230.8% |
| Other | 13.8% |
| Real Estate | 2.9% |
| Cash & Equivalents | 2.7% |
PUSYX Performance
Total returns for PUSYX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 1.6% |
| 1 year | 7.5% |
| 3 years (annualised) | 6.9% |
| 5 years (annualised) | 0.6% |
PUSYX Risk Information
Risk metrics for PUSYX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 3.7%
PUSYX Costs and Fees
PUSYX costs about $67 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.67%
- Gross expense ratio: 0.67%
- Portfolio turnover: 1013%
- Brokerage commissions: 0.27 bps of average net assets (SEC N-CEN)
PUSYX Cashflows
Over the 12 months to 2026-03, Putnam Mortgage Securities Fund had net outflows of $51.73M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-03 | −$212.04K |
| 2026-02 | −$2.18M |
| 2026-01 | −$2.62M |
| 2025-12 | −$1.92M |
| 2025-11 | −$4.09M |
| 2025-10 | −$14.84M |
PUSYX Debt Constituents
No individual debt constituents are reported in Putnam Mortgage Securities Fund's latest SEC N-PORT filing.
PUSYX Prospectus and SEC Filings
Official Putnam Mortgage Securities Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other Long Securitized (MBS/ABS/CMBS) Bond funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.