MFS Inflation-Adjusted Bond R4 (MIAJX)

Fund Assets	1.43B
Expense Ratio	0.493%
Min. Investment	$0.00
Turnover	38.00%
Dividend (ttm)	0.38
Dividend Yield	4.47%
Dividend Growth	-4.04%
Payout Frequency	Quarterly
Ex-Dividend Date	Sep 24, 2026

Previous Close	8.55
YTD Return	-2.27%
1-Year Return	-2.91%
5-Year Return	-3.60%
52-Week Low	8.51
52-Week High	9.25
Beta (5Y)	0.07
Holdings	140
Inception Date	Apr 1, 2005

About MIAJX

MFS Inflation-Adjusted Bond Fund Class R4 is a mutual fund designed to provide total returns that outpace the rate of inflation over the long term, with a primary emphasis on generating current income and a secondary focus on capital appreciation. The fund achieves its stated objective by investing primarily in inflation-protected securities issued by the U.S. Treasury—commonly known as TIPS—along with select securities from government agencies and other eligible entities. As part of its investment strategy, the fund actively manages duration and the yield curve to optimize returns in varying market environments. With net assets of over $1.4 billion as of June 2025, the fund is benchmarked against the Bloomberg U.S. Treasury Inflation Protected Securities Index, which serves as a standard measure for inflation-protected bond performance. This fund plays a significant role in the market for investors seeking mitigation against inflation risk while aiming for steady income, and it is typically utilized by those looking to preserve purchasing power in their fixed income allocation.

• Fund Family: MFS
• Category: Inflation-Protected Bond
• Performance Rating: Below Average
• Risk Rating: Average
• Stock Exchange: Nasdaq
• Ticker Symbol: MIAJX
• Share Class: R4
• Index: Bloomberg U.S. TIPS TR

Performance

MIAJX had a total return of -2.91% in the past year, including dividends. Since the fund's inception, the average annual return has been 2.36%.

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	0.21%
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%
MIAIX	I	0.50%
MIAAX	A	0.65%
MIAHX	R3	0.75%

Dividend History

Ex-Dividend	Amount	Pay Date
Sep 24, 2026	$0.08861	Sep 25, 2026
Jun 25, 2026	$0.16207	Jun 26, 2026
Mar 26, 2026	$0.00133	Mar 27, 2026
Dec 11, 2025	$0.13008	Dec 12, 2025
Sep 25, 2025	$0.10068	Sep 26, 2025
Jun 26, 2025	$0.1387	Jun 27, 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 13, 2026

Data Sources Report a data error