AFFMX Performance — American Funds Mortgage Fund, Class F-3
Data updated: 2026-07-29
AFFMX returned +0.14% year to date and +5.60% over one year to May 2026. Annualised returns are +3.90% over 3 years and +0.75% over 5 years. The fund trailed its Intermediate Securitized Bond category average: $100 invested three years ago grew to $112, against $116 for the category, and to $106 over one year, against $106. Volatility over the past three years was 6.17% a year. In the 12 months to May 2026 the fund took in a net $1.7B, and assets reached $13.08B.
AFFMX Growth of $100
What $100 invested in American Funds Mortgage 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 | AFFMX | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $106 | $106 |
| 3 years (Jun 2023 – May 2026) | $112 | $116 |
| 5 years (Jun 2021 – May 2026) | $104 | $105 |
| Since data start (Sep 2019 – May 2026) | $111 | $111 |
AFFMX Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +0.14% |
| 1 year | +5.60% |
| 3 years (annualised) | +3.90% |
| 5 years (annualised) | +0.75% |
AFFMX Annual Returns
Calendar-year total returns of American Funds Mortgage Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | +0.14% |
| 2025 | +8.89% |
| 2024 | +0.88% |
| 2023 | +4.12% |
| 2022 | −9.74% |
| 2021 | −0.25% |
| 2020 | +7.00% |
| 2019 (Sep–Dec) | +0.16% |
AFFMX 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 | +0.1% | +1.6% | −1.7% | 0.0% | +0.1% | — | — | — | — | — | — | — |
| 2025 | +0.6% | +2.5% | +0.3% | +1.1% | −1.2% | +1.8% | −0.5% | +1.8% | +0.8% | +0.6% | +0.7% | +0.2% |
| 2024 | −0.2% | −1.9% | +0.9% | −2.9% | +2.0% | +1.1% | +2.5% | +1.7% | +1.3% | −3.0% | +1.1% | −1.4% |
| 2023 | +2.9% | −2.7% | +2.6% | +0.5% | −1.1% | −1.1% | −0.2% | −0.6% | −2.7% | −2.0% | +5.0% | +3.7% |
| 2022 | −1.0% | −0.4% | −2.5% | −2.6% | +0.8% | −1.2% | +2.5% | −2.7% | −4.7% | −1.3% | +3.8% | −0.6% |
| 2021 | 0.0% | −0.7% | −0.4% | +0.6% | 0.0% | +0.2% | +0.7% | −0.1% | −0.3% | 0.0% | +0.1% | −0.1% |
| 2020 | +1.1% | +1.3% | +2.0% | +0.9% | +0.2% | +0.4% | +0.4% | +0.1% | +0.1% | −0.1% | +0.4% | +0.2% |
| 2019 | — | — | — | — | — | — | — | — | −0.2% | +0.2% | 0.0% | +0.2% |
AFFMX Risk
Risk measures from monthly returns over Jun 2023 – May 2026.
- 3-year volatility (annualised): 6.17%
- 3-year Sharpe ratio: -0.10 (vs 4.5% risk-free rate)
- Best month: +4.99% (Nov 2023)
- Worst month: −3.04% (Oct 2024)
AFFMX Fund Flows
Monthly money in and out of American Funds Mortgage Fund, from SEC Form N-PORT.
- 12-month net flow: $1.7B
- 12-month gross sales (incl. reinvestments): $2.8B
- Sales ÷ redemptions: 2.49×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $195.6M | $49.1M | $146.5M |
| Apr 2026 | $549.9M | $130.7M | $419.2M |
| Mar 2026 | $114.3M | $326.1M | −$211.8M |
| Feb 2026 | $93.3M | $100.0M | −$6.7M |
| Jan 2026 | $717.6M | $99.7M | $618.0M |
| Dec 2025 | $199.0M | $52.9M | $146.1M |
| Nov 2025 | $136.2M | $106.8M | $29.4M |
| Oct 2025 | $160.0M | $56.3M | $103.7M |
| Sep 2025 | $151.5M | $62.0M | $89.5M |
| Aug 2025 | $137.9M | $64.3M | $73.6M |
| Jul 2025 | $204.1M | $34.5M | $169.6M |
| Jun 2025 | $105.9M | $28.5M | $77.4M |
AFFMX Assets Under Management
Net assets of American Funds Mortgage Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $13.08B |
| 2026-02-28 | $13.08B |
| 2025-11-30 | $12.22B |
| 2025-08-31 | $11.88B |
| 2025-05-31 | $11.34B |
| 2025-02-28 | $11.70B |
| 2024-11-30 | $11.23B |
| 2024-08-31 | $11.00B |
| 2024-05-31 | $10.37B |
| 2024-02-29 | $10.28B |
| 2023-11-30 | $9.54B |
| 2023-08-31 | $9.30B |
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.