Investment Fund

Share Class
Purchase Restrictions: Class F-3 shares are available through certain registered investment advisor and fee-based programs, but are not available for purchase in most employer-sponsored retirement plans. See the prospectus for details.

Summary

Internal Prompt
Quality, income and diversification. With a focus on high-quality mortgage-backed securities that are either guaranteed or sponsored by the U.S. government, this fund may provide a higher level of income than U.S. Treasuries as well as diversification during equity market downturns.
Price at NAV $8.91 as of 3/11/2026 (updated daily)
Fund Assets (millions) $13,120.1
Portfolio Managers
4
Expense Ratio
(Gross/Net %)
0.26 / 0.26%
Prospectus
Internal Prompt

Returns at NAV

Returns with Sales Charge

Asset Mix

U.S. Equities0.0%
Non-U.S. Equities0.0%
U.S. Bonds79.5%
Non-U.S. Bonds0.0%
Cash & Equivalents
20.5%
As of 2/28/2026 (updated monthly)

Growth of 10K

Read important investment disclosures
For Class F-3 Shares, this chart tracks a hypothetical investment with dividends reinvested, over the last 20 years, or since inception date if the fund has been in existence under 20 years, through 12/31/2025.
AFFMX
Bloomberg U.S. Mortgage Backed Securities Index
VIEW LARGER CHART

High & Low Prices

Fund Statistics

5.1 years
Effective Duration
3.9%
Average Yield
to Worst
3.7%
Average Coupon
% of net assets as of 2/28/2026 (updated monthly)

Morningstar Style BoxTM— Fixed-Income

High Quality
Moderate Interest-Rate Sensitivity
Morningstar data as of 12/31/25 (updated quarterly)

Description

Fund Objective
The fund's investment objective is to provide current income and preservation of capital.
Distinguishing Characteristics
With a focus on high-quality mortgage-backed securities that are either guaranteed or sponsored by the U.S. government, this fund may provide a higher level of income than U.S. Treasuries as well as diversification during equity market downturns. This fund seeks to add value by actively managing sector allocation, security selection, duration and yield curve.
Types of Investments
Primarily mortgage-related securities guaranteed by the U.S. government, mortgage-related securities issued by government-sponsored entities but not backed by the full faith and credit of the U.S. government, and non-government mortgage-related securities rated AAA/Aaa or unrated but determined to be of equivalent quality by the fund’s investment adviser. Up to 5% of assets may be invested in securities (excluding securities that are sponsored or guaranteed by the U.S. government, its agencies and instrumentalities) rated AA/Aa or A, or unrated but of equivalent quality.
Holdings Outside the U.S.
Up to 10% of assets may be invested in high-quality, U.S. dollar-denominated mortgage-related securities from issuers outside the U.S.
Maturity
Not required to maintain any particular maturity.
Portfolio Restrictions
Normally, at least 80% of the fund’s assets will be invested in mortgage-related securities.

Fund Facts

Fund Inception 11/01/2010
Fund Assets (millions)
As of 2/28/2026
 $13,120.1
Companies/Issuers
Holdings are as of 2/28/2026 (updated monthly).
 62+
Shareholder Accounts
Shareholder accounts are as of 1/31/2026
 4,112
Regular Dividends Paid
Monthly
Minimum Initial Investment $250
Capital Gains Paid
Dec
Portfolio Turnover (2025) 428%
Fiscal Year-End Aug
Prospectus Date 03/01/2026
CUSIP 02630V 77 4
Fund Number 742

Returns

Internal Prompt

Month-End Returns as of 2/28/26

Returns at NAV
| With Sales Charge
Read important investment disclosures
AFFMX
Bloomberg U.S. Mortgage Backed Securities Index
ANNUAL RETURNS CHART

Quarter-End Returns as of 12/31/25

Internal Prompt

Volatility & Return

Read important investment disclosures

Fixed-Income

For Class F-3 Shares, this chart tracks the 10-year standard deviation
and 10-year annualized return of the fixed income funds
AFFMX
Bloomberg U.S. Mortgage Backed Securities Index
Other AF Funds
Standard Deviation as of 02/28/2026 (updated monthly) . Annualized return as of 02/28/2026 (updated monthly) .
VIEW LARGER CHART
Internal Prompt

Yield

12-month
Distribution Rates
30-day SEC Yield
Fund at NAV 4.52% 4.03%
Fund at MOP N/A N/A
As of 2/28/2026 (updated monthly)

Portfolio Management

Years of Experience with Fund
Years of Experience with Capital Group
Years of Experience with Investment Industry
David Betanzos 12 24 28
Oliver Edmonds 6 22 23
Fergus MacDonald 15 22 33
Pratyoosh Pratyoosh 2 13 19
A boldface number indicates that years of experience with Capital Group is equal to years of experience with investment industry.

Ratings & Risk

Morningstar Rating TM


Overall Morningstar RatingTM
Funds rated(124)
3-yr. Morningstar RatingTM
(124 funds rated)
5-yr. Morningstar RatingTM
(123 funds rated)
10-yr. Morningstar RatingTM
(105 funds rated)
Overall Morningstar Risk Average
HIGH
LOW
Category
Government Mortgage-Backed Bond
ADVANTAGES AND DISADVANTAGES OF MORNINGSTAR RATINGS
Ratings are based on risk-adjusted returns as of 2/28/2026 (updated monthly).

Risk Measures

Fund
Standard Deviation
4.79
Sharpe Ratio
-0.05
For the 10 Years ending 2/28/26 (updated monthly).
American Funds
Benchmark
Morningstar
Benchmark
Bloomberg U.S. Mortgage Backed Securities Index
Bloomberg US Agg Bond TR USD
R-squared
88 88
Beta
0.89 0.89
Capture Ratio (Downside/Upside)
79/85 79/85
American Funds Benchmark for the 10 Years ending 2/28/26 (updated monthly).
Morningstar Benchmark for the 10 Years ending 2/28/26 (updated monthly).
U.S. Treasuries/Agencies
7.9%
AAA/Aaa
3.1%
AA/Aa
67.9%
A
0.2%
Unrated
0.4%
Cash & equivalents
20.5%
% of net assets as of 2/28/2026 (updated monthly)

Average Life Breakdown

0-4.9 Years
50.8%
5-9.9 Years
30.2%
10-19.9 Years
4.0%
20-29.9 Years
1.4%
30+ Years
--
% of net assets as of 12/31/2025 (updated monthly)

Holdings

Bonds Breakdown

Bond Details

Total bond holdings
U.S. Treasury bonds & notes 7.0%
Asset-backed obligations 0.7%

% of net assets as of 12/31/2025 (updated quarterly)

Top Fixed-Income Issuers

Federal Home Loan Mortgage
31.1%
Fannie Mae
27.0%
U.S. Treasury
8.0%
UMBS
7.5%
Ginnie Mae II
3.4%
Freddie Mac Seasoned Credit Risk Transfer Trus ...
0.4%
Freddie Mac Gold
0.3%
Citigroup Commercial Mortgage Trust CGCMT_23-S ...
0.3%
Freddie Mac Multifamily Structured Pass Throug ...
0.2%
Seasoned Loans Structured Transaction Trust Se ...
0.2%

% of net assets as of 1/31/2026 (updated monthly)

Prices & Distributions

Internal Prompt

Historical Prices Month-End

2026

Historical Prices Year-End

Internal Prompt

Historical Distributions as of 03/11/26

FIND HISTORICAL DISTRIBUTIONS
2026
Record
Date		 Calculated
Date		 Pay Date
Income Dividend Regular
Income Dividend Special
Cap. Gains Long-Term
Cap. Gains Short-Term
Reinvest NAV
Daily 01/30/26 02/02/26 $0.033066 $0.00 $0.00 $0.00 $8.93
Daily 02/27/26 03/02/26 $0.0321858 $0.00 $0.00 $0.00 $9.04
2026 Year-to-Date: Dividends Subtotal: $0.06525181 Cap Gains Subtotal: $0.00
Total Distributions: $0.06525181

Fees & Expenses

Internal Prompt

Fees

Annual Management Fees 0.22%
Other Expenses 0.04%
Service 12b-1 --
As of each fund's most recent prospectus.
Internal Prompt

Expense Ratio

AFFMX 0.26%
Lipper U.S. Mortgage Funds Average
--%
Fund as of most recent prospectus. Lipper Category as of -- (updated quarterly).