American Century High Yield Municipal Fund I Class (AYMIX)

Fund Assets	564.32M
Expense Ratio	0.40%
Min. Investment	$5,000,000
Turnover	49.00%
Dividend (ttm)	0.40
Dividend Yield	4.71%
Dividend Growth	0.20%
Payout Frequency	Monthly
Ex-Dividend Date	Aug 31, 2026

Previous Close	8.36
YTD Return	-0.98%
1-Year Return	0.78%
5-Year Return	-2.28%
52-Week Low	8.36
52-Week High	8.86
Beta (5Y)	0.12
Holdings	419
Inception Date	Mar 1, 2010

About AYMIX

American Century High-Yield Municipal Fund I Class is an open-end mutual fund focused on providing shareholders with high current income that is exempt from federal income taxes. The fund primarily invests in municipal and other debt securities, emphasizing high-yield (below investment grade) issues to achieve its income objective, with capital appreciation as a secondary goal. Its portfolio spans a broad spectrum of U.S. municipalities and typically holds hundreds of individual securities, offering diversification across regions and sectors such as local government projects, education, and public utilities. As an institutional share class, it is tailored to large investors, with a high minimum investment requirement and a competitive net expense ratio. The fund is managed by American Century, leveraging collaborative research and credit analysis while navigating credit and liquidity risks inherent in lower-rated municipal bonds. Its monthly income distributions and tax-advantaged status make it a notable asset for investors seeking regular income that is less impacted by federal taxes, playing a key role within the high-yield municipal bond segment of fixed-income markets.

• Fund Family: American Century Investments
• Category: High Yield Muni
• Performance Rating: Above Average
• Risk Rating: Average
• Stock Exchange: NASDAQ
• Ticker Symbol: AYMIX
• Share Class: I Class
• Index: Index is not available on Lipper Database

Performance

AYMIX had a total return of 0.78% in the past year, including dividends. Since the fund's inception, the average annual return has been 3.68%.

Other Share Classes

These are alternative share classes of the same fund, from the same provider.

Symbol	Share Class	Expense Ratio
AYMYX	Y Class	0.37%
ABHYX	Investor Class	0.60%
AYMAX	A Class	0.85%
AYMCX	C Class	1.60%

Dividend History

Ex-Dividend	Amount	Pay Date
Aug 31, 2026	$0.03142	Aug 31, 2026
Jul 31, 2026	$0.03513	Jul 31, 2026
Jun 30, 2026	$0.03195	Jun 30, 2026
May 29, 2026	$0.03152	May 29, 2026
Apr 30, 2026	$0.03203	Apr 30, 2026
Mar 31, 2026	$0.03219	Mar 31, 2026

Data Sources: Tiingo, Twelve Data, and more

Historical data is provided by Tiingo. Delayed stock pricing data is provided by Twelve Data. Several fund data points are also provided by Finnhub.

Last checked:

Sep 19, 2026

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