Investment Fund

Share Class
Purchase Restrictions: Class F-2 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 $8.95 as of 1/13/2026 (updated daily)
Fund Assets (millions) $12,381.0
Portfolio Managers
4
Expense Ratio
(Gross/Net %)
0.41 / 0.37%
Quarterly Fund Fact Sheet (PDF)
Prospectus
Internal Prompt

Returns at NAV

Returns at MOP

Asset Mix

U.S. Equities0.0%
Non-U.S. Equities0.0%
U.S. Bonds86.4%
Non-U.S. Bonds0.0%
Cash & Equivalents
13.6%
As of 12/31/2025 (updated monthly)
Internal Prompt

Volatility & Return

Read important investment disclosures

Fixed-Income

For Class F-2 Shares, this chart tracks the 10-year standard deviation
and 10-year annualized return of the fixed income funds
MFAFX
Bloomberg U.S. Mortgage Backed Securities Index
Other AF Funds
Standard Deviation as of 12/31/2025 (updated monthly) . Annualized return as of 12/31/2025 (updated monthly) .
VIEW LARGER CHART

Fund Statistics

5.5 years
Effective Duration
4.3%
Average Yield
to Worst
4.1%
Average Coupon
% of net assets as of 12/31/2025 (updated monthly)

Morningstar Style BoxTM— Fixed-Income

High Quality
Moderate Interest-Rate Sensitivity
Morningstar data as of 9/30/25 (updated quarterly)

Description

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 12/31/2025
 $12,381.0
Companies/Issuers
Holdings are as of 12/31/2025 (updated monthly).
 56+
Shareholder Accounts
Shareholder accounts are as of 11/30/2025
 28,007
Regular Dividends Paid
Monthly
Minimum Initial Investment $250
Capital Gains Paid
Dec
Portfolio Turnover (2025) 428%
Fiscal Year-End Aug
Prospectus Date 11/01/2025
CUSIP 02630V 50 1
Fund Number 642

Returns

Internal Prompt

Month-End Returns as of 12/31/25

Returns at NAV
| at MOP
Read important investment disclosures
MFAFX
Bloomberg U.S. Mortgage Backed Securities Index
ANNUAL RETURNS CHART

Quarter-End Returns as of 12/31/25

Growth of 10K

Read important investment disclosures
For Class F-2 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 12/31/2024.
MFAFX
Bloomberg U.S. Mortgage Backed Securities Index
VIEW LARGER CHART

High & Low Prices

Internal Prompt

Yield

12-month
Distribution Rates
30-day SEC Yield
Fund at NAV 4.48% 4.17%
Fund at MOP N/A N/A
As of 12/31/2025 (updated monthly)
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(130)
3-yr. Morningstar RatingTM
(130 funds rated)
5-yr. Morningstar RatingTM
(129 funds rated)
10-yr. Morningstar RatingTM
(111 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 12/31/2025 (updated monthly).

Lipper Leader Scorecard

Over-all 3 yr. 5 yr. 10 yr.
Consistent Return Within Category
Funds Rated
(145)
(145)
(128)
(99)
Expense Within Category
Funds Rated
(96)
(96)
(91)
(65)
Preservation Within Category
Funds Rated
(5996)
(5996)
(5594)
(4259)
Tax Efficiency Within Category
Funds Rated
(145)
(145)
(128)
(99)
Total Return Within Category
Funds Rated
(145)
(145)
(128)
(99)
Category US Mortgage Funds
KEY
HIGHEST LOWEST
As of 12/31/2025 (updated monthly)

Risk Measures

Fund
Standard Deviation
4.77
Sharpe Ratio
-0.06
For the 10 Years ending 12/31/25 (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)
--/-- 80/83
American Funds Benchmark for the 10 Years ending 12/31/25 (updated monthly).
Morningstar Benchmark for the 10 Years ending 12/31/25 (updated monthly).
U.S. Treasuries/Agencies
7.0%
AAA/Aaa
2.4%
AA/Aa
76.4%
A
0.2%
Unrated
0.4%
Cash & equivalents
13.5%
% of net assets as of 12/31/2025 (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
36.1%
Fannie Mae
30.7%
U.S. Treasury
7.0%
UMBS
6.5%
Ginnie Mae II
2.7%
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 12/31/2025 (updated monthly)

Prices & Distributions

Internal Prompt

Historical Prices Month-End

2025

Historical Prices Year-End

Internal Prompt

Historical Distributions as of 01/13/26

FIND HISTORICAL DISTRIBUTIONS
2025
Record
Date		 Calculated
Date		 Pay Date
Income Dividend Regular
Income Dividend Special
Cap. Gains Long-Term
Cap. Gains Short-Term
Reinvest NAV
Daily 01/31/25 02/03/25 $0.0334751 $0.00 $0.00 $0.00 $8.63
Daily 02/28/25 03/03/25 $0.0328089 $0.00 $0.00 $0.00 $8.81
Daily 03/31/25 04/01/25 $0.0331585 $0.00 $0.00 $0.00 $8.80
Daily 04/30/25 05/01/25 $0.0329347 $0.00 $0.00 $0.00 $8.86
Daily 05/30/25 06/02/25 $0.0337954 $0.00 $0.00 $0.00 $8.72
Daily 06/30/25 07/01/25 $0.0335575 $0.00 $0.00 $0.00 $8.84
Daily 07/31/25 08/01/25 $0.0346554 $0.00 $0.00 $0.00 $8.76
Daily 08/29/25 09/02/25 $0.033992 $0.00 $0.00 $0.00 $8.88
Daily 09/30/25 10/01/25 $0.0334893 $0.00 $0.00 $0.00 $8.92
Daily 10/31/25 11/03/25 $0.0336182 $0.00 $0.00 $0.00 $8.95
Daily 11/28/25 12/01/25 $0.032256 $0.00 $0.00 $0.00 $8.97
Daily 12/31/25 01/02/26 $0.0336279 $0.00 $0.00 $0.00 $8.95
2025 Year-to-Date: Dividends Subtotal: $0.40136902 Cap Gains Subtotal: $0.00
Total Distributions: $0.40136902

Fees & Expenses

Internal Prompt

Fees

Annual Management Fees 0.26%
Other Expenses 0.15%
Service 12b-1 --
As of each fund's most recent prospectus.
Internal Prompt

Expense Ratio

Gross Net
MFAFX 0.41% 0.37%
Lipper U.S. Mortgage Funds Average
--%
Fund as of most recent prospectus. Lipper Category as of -- (updated quarterly).