MFS Inflation-Adjusted Bond Fund Class B (MIABX)

Fund Assets	1.43B
Expense Ratio	1.441%
Min. Investment	$1,000
Turnover	38.00%
Dividend (ttm)	0.31
Dividend Yield	3.62%
Dividend Growth	5.22%
Payout Frequency	Quarterly
Ex-Dividend Date	Sep 24, 2026

Previous Close	8.51
YTD Return	-2.65%
1-Year Return	-3.69%
5-Year Return	-7.86%
52-Week Low	8.47
52-Week High	9.20
Beta (5Y)	0.07
Holdings	140
Inception Date	Sep 1, 2004

About MIABX

MFS Inflation-Adjusted Bond Fund Class B is a mutual fund designed to provide investors with a total return that surpasses the rate of inflation over the long term, emphasizing current income while also considering capital appreciation. The fund primarily invests at least 80% of its net assets in inflation-adjusted debt instruments, such as U.S. Treasury Inflation-Protected Securities (TIPS), and can also allocate assets to inflation-linked securities issued by U.S. government agencies and other entities. This focus on inflation-protected bonds aims to help preserve the purchasing power of capital for investors amid rising consumer prices. The fund employs active strategies in duration and yield curve management to seek added value, and it is benchmarked against the Bloomberg U.S. Treasury Inflation Protected Securities Index. Established in 2004, the fund plays a notable role within the fixed-income sector, offering an option for investors seeking resilience against inflation within a diversified bond portfolio. The Class B share structure involves a contingent deferred sales charge that decreases over time, and ongoing operating expenses are reflected in its expense ratio.

• Fund Family: MFS
• Category: Inflation-Protected Bond
• Performance Rating: Below Average
• Risk Rating: Average
• Stock Exchange: Nasdaq
• Ticker Symbol: MIABX
• Share Class: B
• Index: Bloomberg U.S. TIPS TR

Performance

MIABX had a total return of -3.69% in the past year, including dividends. Since the fund's inception, the average annual return has been 1.66%.

Equivalent Funds

These are funds that follow the same index from the other major fund companies.

Symbol	Provider	Name	Expense Ratio
SWRSX	Schwab	Schwab Treasury Inflation Protected Securities Index Fund	0.05%
VIPSX	Vanguard	Vanguard Inflation-Protected Securities Fund Investor Shares	0.20%
FIPDX	Fidelity	Fidelity Inflation-Protected Bond Index Fund	0.05%

Other Share Classes

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

Symbol	Share Class	Expense Ratio
MIAKX	R6	0.41%
MIAJX	R4	0.50%
MIAIX	I	0.50%
MIAAX	A	0.65%

Dividend History

Ex-Dividend	Amount	Pay Date
Sep 24, 2026	$0.06733	Sep 25, 2026
Jun 25, 2026	$0.13933	Jun 26, 2026
Dec 11, 2025	$0.10166	Dec 12, 2025
Sep 25, 2025	$0.07259	Sep 26, 2025
Jun 26, 2025	$0.11272	Jun 27, 2025
Mar 25, 2025	$0.01054	Mar 26, 2025

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:

Oct 16, 2026

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