MFS Inflation-Adjusted Bond Fund I (MIAIX)
9.18
0.00 (0.00%)
USD |
Nov 03 2025
Key Stats
Customize
| Net Expense Ratio | Total Assets Under Management | Weighted Average Dividend Yield | Turnover Ratio (Generic) |
|---|---|---|---|
| 0.49% | 1.561B | -- | 27.00% |
| 1 Year Fund Level Flows | 1 Year Total Returns (Daily) | Annualized Total Returns Since Inception (Daily) | Max Drawdown (Since Inception) |
| -40.77M | 5.97% | Upgrade | Upgrade |
Basic Info
| Investment Strategy | |
| The Fund seeks a total return that exceeds the rate of inflation over the long term by focusing its investments in inflation-adjusted debt securities issued by the U.S. Treasury. |
| General | |
| Security Type | Mutual Fund |
| Broad Asset Class | Taxable Bond |
| Broad Category | Fixed Income |
| Global Peer Group | Bond USD Inflation Linked |
| Peer Group | Inflation Protected Bond Funds |
| Global Macro | Bond HC |
| US Macro | Short-/Intermediate-Term U.S. Government & Treasury Funds |
| YCharts Categorization | -- |
| YCharts Benchmark | -- |
| Prospectus Objective | Inflation Protected Bond Funds |
| Fund Owner Firm Name | MFS |
| Broad Asset Class Benchmark Index | |
| ^BBUSATR | 100.0% |
Net Fund Flows Versus Peer Group
1 Month
% Rank:
84
-72.86M
Peer Group Low
1.698B
Peer Group High
1 Year
% Rank:
70
-40.77M
-4.062B
Peer Group Low
6.318B
Peer Group High
3 Months
% Rank:
84
-228.93M
Peer Group Low
2.414B
Peer Group High
3 Years
% Rank:
42
-13.09B
Peer Group Low
13.47B
Peer Group High
6 Months
% Rank:
17
-224.03M
Peer Group Low
4.186B
Peer Group High
5 Years
% Rank:
22
-9.924B
Peer Group Low
19.00B
Peer Group High
YTD
% Rank:
75
-1.536B
Peer Group Low
5.880B
Peer Group High
10 Years
% Rank:
37
-6.503B
Peer Group Low
41.75B
Peer Group High
Date Unavailable
Risk
Performance Versus Peer Group
Annual Total Returns Versus Peers
As of November 04, 2025.
Asset Allocation
As of September 30, 2025.
| Type | % Net |
|---|---|
| Cash | 0.72% |
| Stock | 0.00% |
| Bond | 99.23% |
| Convertible | 0.00% |
| Preferred | 0.00% |
| Other | 0.06% |
Top 10 Holdings
| Name | % Weight | Price | % Change |
|---|---|---|---|
| United States of America USGB 0.125 01/15/2031 FIX USD Government | 12.11% | 93.77 | 0.08% |
| United States of America USGB 0.125 07/15/2030 FIX USD Government | 10.98% | 94.90 | 0.07% |
| United States of America USGB 1.75 01/15/2034 FIX USD Government | 7.45% | 100.37 | 0.10% |
| United States of America USGB 0.875 01/15/2029 FIX USD Government | 7.31% | 98.93 | 0.06% |
| United States of America USGB 0.125 01/15/2032 FIX USD Government | 6.16% | 91.94 | 0.09% |
| United States of America USGB 0.75 02/15/2042 FIX USD Government | 6.01% | 79.62 | -0.30% |
| United States of America USGB 0.375 07/15/2027 FIX USD Government | 5.71% | 99.05 | 0.04% |
| United States of America USGB 1.125 01/15/2033 FIX USD Government | 4.78% | 96.79 | 0.09% |
| United States of America USGB 3.625 04/15/2028 FIX USD Government | 4.69% | 105.76 | 0.03% |
| United States of America USGB 1.375 07/15/2033 FIX USD Government | 4.41% | 98.37 | 0.09% |
Fees & Availability
| Fees | |
| Actual 12B-1 Fee | -- |
| Actual Management Fee | 0.37% |
| Administration Fee | 1.01K% |
| Maximum Front Load | -- |
| Maximum Deferred Load | -- |
| Maximum Redemption Fee | 0.00% |
| General Availability | |
| Available for Insurance Product | -- |
| Available for RRSP | -- |
| Purchase Details | |
| Open to New Investors |
|
| Minimum Initial Investment | 0.00 None |
| Minimum Subsequent Investment | 0.00 None |
Basic Info
| Investment Strategy | |
| The Fund seeks a total return that exceeds the rate of inflation over the long term by focusing its investments in inflation-adjusted debt securities issued by the U.S. Treasury. |
| General | |
| Security Type | Mutual Fund |
| Broad Asset Class | Taxable Bond |
| Broad Category | Fixed Income |
| Global Peer Group | Bond USD Inflation Linked |
| Peer Group | Inflation Protected Bond Funds |
| Global Macro | Bond HC |
| US Macro | Short-/Intermediate-Term U.S. Government & Treasury Funds |
| YCharts Categorization | -- |
| YCharts Benchmark | -- |
| Prospectus Objective | Inflation Protected Bond Funds |
| Fund Owner Firm Name | MFS |
| Broad Asset Class Benchmark Index | |
| ^BBUSATR | 100.0% |
Fundamentals
| General | |
| Distribution Yield | -- |
| Dividend Yield TTM (10-31-25) | 4.34% |
| 30-Day SEC Yield (9-30-25) | 1.59% |
| 7-Day SEC Yield | -- |
| Number of Holdings | 112 |
| Bond | |
| Yield to Maturity (9-30-25) | 1.69% |
| Effective Duration | 6.74 |
| Average Coupon | 1.16% |
| Calculated Average Quality | 1.975 |
| Effective Maturity | 8.566 |
| Nominal Maturity | 8.566 |
| Number of Bond Holdings | 108 |
As of September 30, 2025
Fund Details
| Key Dates | |
| Inception Date | 9/30/2003 |
| Last Annual Report Date | 10/31/2024 |
| Last Prospectus Date | 2/28/2025 |
| Share Classes | |
| MIAAX | A |
| MIABX | B |
| MIACX | C |
| MIAHX | Retirement |
| MIAJX | Retirement |
| MIAKX | Retirement |
| MIALX | Retirement |
| MIATX | Retirement |
| Attributes | |
| Index Fund | -- |
| Inverse Fund | -- |
| Leveraged Fund | -- |
| Fund of Funds | No |
| Currency Hedged Fund | -- |
| Synthetic Replication Fund | No |
Top Portfolio Holders
| Name | % Weight |
|---|---|
| Portfolio A | 5.00% |
| Portfolio B | 3.50% |
| Portfolio C | 2.25% |
Excel Add-In Codes
| Name: =YCI("M:MIAIX", "name") |
| Broad Asset Class: =YCI("M:MIAIX", "broad_asset_class") |
| Broad Category: =YCI("M:MIAIX", "broad_category_group") |
| Prospectus Objective: =YCI("M:MIAIX", "prospectus_objective") |
| To find the codes for any of our securities and financial metrics, see our Complete Excel Reference. |