FMSFX — Fidelity Advisor Mortgage Securities Fund
Data updated: 2026-07-24
FMSFX — Fidelity Advisor Mortgage Securities Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. Long Securitized (MBS/ABS/CMBS) Bond · $766.76M AUM · 0.45% expense ratio · 7.1% 1-yr return. From SEC regulatory filings.
FMSFX Fund Overview
FMSFX — Fidelity Advisor Mortgage Securities Fund is a US mutual fund managed by Fidelity Advisor Series II, 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: Fidelity Advisor Series II
- Category: Long Securitized (MBS/ABS/CMBS) Bond
- Assets under management: $766.76M
- 1-year return: 7.1%
- Ticker: FMSFX
- SEC CIK: 0000795422
- SEC series ID: S000005133
- Share class ID: C000014129
FMSFX Holdings
Top 10 holdings of Fidelity Advisor Mortgage Securities Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Fnma/fhlg Tba Issuer | 6.44% |
| Gnma Ii Gtd Pass Thru Ctf Multiple Issuer | 4.73% |
| Fidelity Revere Street Trust | 3.46% |
| Gnma Ii Gtd Pass Thru Ctf Multiple Issuer | 2.37% |
| Gnma Ii Gtd Pass Thru Ctf Multiple Issuer | 1.96% |
| Gnma Ii Gtd Pass Thru Ctf Multiple Issuer | 1.90% |
| Fed Home Loan Mtg Corp. - Gold | 1.54% |
| Ust Notes | 1.26% |
| Fnma/fhlg Tba Issuer | 1.24% |
| Fed Home Loan Mtg Corp. - Gold | 1.14% |
FMSFX Portfolio Allocation
Asset-class allocation of Fidelity Advisor Mortgage Securities Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Securitized | 110.6% |
| Fixed Income | 4.9% |
| Cash & Equivalents | 3.5% |
| Real Estate | 0.3% |
| Derivatives | 0.1% |
FMSFX Performance
Total returns for FMSFX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 2.1% |
| 1 year | 7.1% |
| 3 years (annualised) | 5.2% |
| 5 years (annualised) | 0.4% |
FMSFX Risk Information
Risk metrics for FMSFX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 2.9%
FMSFX Costs and Fees
FMSFX costs about $45 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.45%
- Gross expense ratio: 0.45%
- Portfolio turnover: 652%
- Brokerage commissions: 0.32 bps of average net assets (SEC N-CEN)
FMSFX Cashflows
Over the 12 months to 2026-02, Fidelity Advisor Mortgage Securities Fund had net inflows of $114.48M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-02 | $6.98M |
| 2026-01 | $18.41M |
| 2025-12 | $12.82M |
| 2025-11 | $5.09M |
| 2025-10 | $8.40M |
| 2025-09 | $4.08M |
FMSFX Debt Constituents
Largest debt holdings of Fidelity Advisor Mortgage Securities Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Ust Notes | 1.26% |
| United States Treasury Bond | 1.05% |
| Ust Notes | 0.79% |
| Ust Notes | 0.31% |
| Ust Notes | 0.29% |
| United States Treasury Bond | 0.28% |
| Ust Notes | 0.25% |
| Ust Notes | 0.25% |
| United States Treasury Bond | 0.12% |
| United States Treasury Bond | 0.11% |
FMSFX Prospectus and SEC Filings
Official Fidelity Advisor 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.