FMSFX Performance — Fidelity Advisor Mortgage Securities Fund
Data updated: 2026-07-24
FMSFX returned +1.07% year to date and +6.75% over one year to May 2026. Annualised returns are +4.27% over 3 years and +0.26% over 5 years. Against its Intermediate Securitized Bond category average the fund came out behind over three years but ahead over one: $100 invested three years ago grew to $113, against $116 for the category, and to $107 over one year, against $106. Volatility over the past three years was 6.62% a year. In the 12 months to May 2026 the fund took in a net $140.8M, and assets reached $766.76M.
FMSFX Growth of $100
What $100 invested in Fidelity Advisor Mortgage Securities Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Intermediate Securitized Bond category average over the same months.
| Period | FMSFX | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $107 | $106 |
| 3 years (Jun 2023 – May 2026) | $113 | $116 |
| 5 years (Jun 2021 – May 2026) | $101 | $105 |
| Since data start (Sep 2019 – May 2026) | $106 | $111 |
FMSFX Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +1.07% |
| 1 year | +6.75% |
| 3 years (annualised) | +4.27% |
| 5 years (annualised) | +0.26% |
FMSFX Annual Returns
Calendar-year total returns of Fidelity Advisor Mortgage Securities Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | +1.07% |
| 2025 | +8.15% |
| 2024 | +0.89% |
| 2023 | +4.90% |
| 2022 | −12.20% |
| 2021 | −1.06% |
| 2020 | +4.40% |
| 2019 (Sep–Dec) | +0.72% |
FMSFX 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +0.5% | +1.6% | −1.6% | +0.3% | +0.2% | — | — | — | — | — | — | — |
| 2025 | +0.6% | +2.5% | 0.0% | +0.1% | −0.9% | +1.7% | −0.4% | +1.6% | +1.1% | +0.8% | +0.6% | 0.0% |
| 2024 | −0.2% | −1.8% | +0.9% | −3.1% | +2.0% | +1.4% | +2.5% | +1.6% | +1.2% | −2.9% | +1.4% | −1.8% |
| 2023 | +3.2% | −2.7% | +2.0% | +0.7% | −1.0% | −0.4% | 0.0% | −0.9% | −3.2% | −2.3% | +5.6% | +4.5% |
| 2022 | −1.5% | −1.0% | −2.8% | −3.5% | +1.3% | −1.8% | +3.3% | −3.4% | −5.2% | −1.6% | +4.2% | −0.5% |
| 2021 | +0.1% | −0.6% | −0.6% | +0.6% | −0.4% | +0.1% | +0.6% | −0.1% | −0.3% | −0.4% | −0.1% | 0.0% |
| 2020 | +0.7% | +1.0% | +0.5% | +0.9% | +0.2% | +0.1% | +0.3% | +0.3% | 0.0% | 0.0% | +0.1% | +0.3% |
| 2019 | — | — | — | — | — | — | — | — | 0.0% | +0.4% | +0.2% | +0.1% |
FMSFX Risk
Risk measures from monthly returns over Jun 2023 – May 2026.
- 3-year volatility (annualised): 6.62%
- 3-year Sharpe ratio: -0.04 (vs 4.5% risk-free rate)
- Best month: +5.59% (Nov 2023)
- Worst month: −3.25% (Sep 2023)
FMSFX Fund Flows
Monthly money in and out of Fidelity Advisor Mortgage Securities Fund, from SEC Form N-PORT.
- 12-month net flow: $140.8M
- 12-month gross sales (incl. reinvestments): $293.7M
- Sales ÷ redemptions: 1.92×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $28.5M | $31.3M | −$2.8M |
| Apr 2026 | $34.9M | $18.9M | $16.0M |
| Mar 2026 | $41.9M | $18.7M | $23.3M |
| Feb 2026 | $15.0M | $8.1M | $7.0M |
| Jan 2026 | $27.9M | $9.5M | $18.4M |
| Dec 2025 | $21.6M | $8.7M | $12.8M |
| Nov 2025 | $14.0M | $8.9M | $5.1M |
| Oct 2025 | $17.4M | $9.0M | $8.4M |
| Sep 2025 | $12.9M | $8.8M | $4.1M |
| Aug 2025 | $13.4M | $9.2M | $4.2M |
| Jul 2025 | $24.1M | $11.6M | $12.5M |
| Jun 2025 | $42.1M | $10.2M | $31.9M |
FMSFX Assets Under Management
Net assets of Fidelity Advisor Mortgage Securities Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $766.76M |
| 2026-02-28 | $745.54M |
| 2025-11-30 | $698.22M |
| 2025-08-31 | $669.37M |
| 2025-05-31 | $608.46M |
| 2025-02-28 | $608.73M |
| 2024-11-30 | $600.76M |
| 2024-08-31 | $607.00M |
| 2024-05-31 | $572.31M |
| 2024-02-29 | $469.20M |
| 2023-11-30 | $438.54M |
| 2023-08-31 | $493.05M |
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.