MIATX Holdings — MFS Inflation-Adjusted Bond Fund
Data updated: 2026-09-24
MIATX holds 128 securities. The top 10 make up 67.4% of net assets, led by U.S. Treasury Inflation-Indexed Notes (11.27%) and U.S. Treasury Inflation-Indexed Notes (9.60%). Government Bonds (89.7%) and Mortgage / Securitized (9.4%) are the largest sectors, and 98.5% of the portfolio is in United States. Debt holdings: 25 positions, 89.8% of assets.
Holdings cover 99.89% of net asset value (99.94% of total assets; remainder is cash and receivables). As of July 31, 2026 · N-PORT.
MIATX Portfolio Holdings
128 holdings of MFS Inflation-Adjusted Bond Fund by percentage of net assets, from the fund's SEC N-PORT filing as of July 31, 2026. The 100 largest are listed below; the interactive table on this page lists all 128.
| Holding | Ticker | Sector | % of net assets | Value (USD) |
|---|---|---|---|---|
| U.S. Treasury Inflation-Indexed Notes | — | Government Bonds | 11.27% | $167.87M |
| U.S. Treasury Inflation-Indexed Notes | — | Government Bonds | 9.60% | $142.97M |
| U.S. Treasury Inflation-Indexed Notes | — | Government Bonds | 8.89% | $132.46M |
| U.S. Treasury Inflation-Indexed Notes | — | Government Bonds | 7.66% | $114.07M |
| U.S. Treasury Inflation-Indexed Notes | — | Government Bonds | 6.53% | $97.21M |
| U.S. Treasury Inflation-Indexed Bonds | — | Government Bonds | 5.40% | $80.51M |
| U.S. Treasury Inflation-Indexed Notes | — | Government Bonds | 5.00% | $74.52M |
| U.S. Treasury Inflation-Indexed Notes | — | Government Bonds | 4.60% | $68.53M |
| U.S. Treasury Inflation-Indexed Notes | — | Government Bonds | 4.34% | $64.60M |
| U.S. Treasury Inflation-Indexed Notes | — | Government Bonds | 4.15% | $61.85M |
| U.S. Treasury Inflation-Indexed Notes | — | Government Bonds | 3.93% | $58.48M |
| U.S. Treasury Inflation-Indexed Bonds | — | Government Bonds | 3.81% | $56.80M |
| U.S. Treasury Inflation-Indexed Notes | — | Government Bonds | 2.72% | $40.47M |
| U.S. Treasury Inflation-Indexed Bonds | — | Government Bonds | 2.57% | $38.30M |
| U.S. Treasury Inflation-Indexed Bonds | — | Government Bonds | 2.48% | $37.02M |
| U.S. Treasury Inflation-Indexed Bonds | — | Government Bonds | 1.80% | $26.88M |
| U.S. Treasury Inflation-Indexed Bonds | — | Government Bonds | 1.42% | $21.13M |
| U.S. Treasury Inflation-Indexed Bonds | — | Government Bonds | 1.19% | $17.76M |
| U.S. Treasury Inflation-Indexed Notes | — | Government Bonds | 0.80% | $11.85M |
| U.S. Treasury Inflation-Indexed Notes | — | Government Bonds | 0.75% | $11.10M |
| MFS Institutional Money Market Portfolio | — | Funds & ETFs | 0.50% | $7.51M |
| PMT Loan Trust 2026-INV2 | — | Mortgage / Securitized | 0.49% | $7.29M |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.44% | $6.57M |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.43% | $6.39M |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.43% | $6.38M |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.40% | $5.96M |
| Palmer Square Loan Funding 2025-2 Ltd | — | Mortgage / Securitized | 0.38% | $5.70M |
| U.S. Treasury Inflation-Indexed Notes | — | Government Bonds | 0.37% | $5.51M |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.36% | $5.40M |
| U.S. Treasury Inflation-Indexed Bonds | — | Government Bonds | 0.33% | $4.84M |
| Palmer Square Loan Funding 2025-1 Ltd | — | Mortgage / Securitized | 0.29% | $4.30M |
| Shackleton 2019-XIV Clo Ltd | — | Mortgage / Securitized | 0.27% | $4.00M |
| Fannie Mae REMICS | — | Mortgage / Securitized | 0.26% | $3.91M |
| Freddie Mac REMICS | — | Mortgage / Securitized | 0.25% | $3.69M |
| New Residential Mortgage Loan Trust 2026-NQM2 | — | Mortgage / Securitized | 0.24% | $3.57M |
| Freddie Mac REMICS | — | Mortgage / Securitized | 0.23% | $3.41M |
| Fannie Mae REMICS | — | Mortgage / Securitized | 0.23% | $3.36M |
| BX Trust 2026-CLS | — | Mortgage / Securitized | 0.20% | $3.04M |
| Barings Clo Ltd 2021-III | — | Mortgage / Securitized | 0.20% | $3.00M |
| Fannie Mae REMICS | — | Mortgage / Securitized | 0.19% | $2.84M |
| Freddie Mac REMICS | — | Mortgage / Securitized | 0.19% | $2.77M |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.18% | $2.75M |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.17% | $2.52M |
| AREIT 2022-CRE6 Trust | — | Mortgage / Securitized | 0.17% | $2.46M |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.16% | $2.44M |
| Toledo Hospital/The | — | Corporate Bonds | 0.16% | $2.44M |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.16% | $2.35M |
| Fannie Mae REMICS | — | Mortgage / Securitized | 0.14% | $2.02M |
| Freddie Mac REMICS | — | Mortgage / Securitized | 0.11% | $1.70M |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.11% | $1.64M |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.10% | $1.53M |
| Fannie Mae REMICS | — | Mortgage / Securitized | 0.10% | $1.46M |
| PMT Loan Trust 2025-INV10 | — | Mortgage / Securitized | 0.10% | $1.44M |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.10% | $1.44M |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.09% | $1.39M |
| Conservation Fund A Nonprofit Corp/The | — | Corporate Bonds | 0.09% | $1.36M |
| PMT Loan Trust 2026-CNF1 | — | Mortgage / Securitized | 0.09% | $1.35M |
| Freddie Mac Multifamily Structured Pass Through Certificates | — | Mortgage / Securitized | 0.08% | $1.21M |
| Long: BM11994 IRS USD R V 00MSOFR SM11994_FLO CCPOIS / Short: BM11994 IRS USD P F 3.51050 SM11994_FIX CCPOIS | — | Unknown | 0.08% | $1.17M |
| JP Morgan Mortgage Trust 2026-NQM1 | — | Mortgage / Securitized | 0.08% | $1.17M |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.08% | $1.16M |
| Freddie Mac Multifamily Structured Pass Through Certificates | — | Mortgage / Securitized | 0.08% | $1.14M |
| Morgan Stanley Residential Mortgage Loan Trust 2025-NQM3 | — | Mortgage / Securitized | 0.08% | $1.12M |
| Benchmark 2021-B28 Mortgage Trust | — | Mortgage / Securitized | 0.07% | $1.04M |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.07% | $1.03M |
| Benchmark 2021-B23 Mortgage Trust | — | Mortgage / Securitized | 0.07% | $986.82K |
| Palmer Square Loan Funding 2024-3 Ltd | — | Mortgage / Securitized | 0.07% | $968.39K |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.06% | $967.46K |
| Long: BM12044 IRS USD R V 00MSOFR SM12044_FLO CCPOIS / Short: BM12044 IRS USD P F 3.63700 SM12044_FIX CCPOIS | — | Unknown | 0.06% | $963.03K |
| Fannie Mae REMICS | — | Mortgage / Securitized | 0.06% | $934.46K |
| Morgan Stanley Capital I Trust 2021-L7 | — | Mortgage / Securitized | 0.06% | $889.36K |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.06% | $864.36K |
| Bank 2021-Bnk31 | — | Mortgage / Securitized | 0.06% | $826.13K |
| Benchmark 2021-B27 Mortgage Trust | — | Mortgage / Securitized | 0.06% | $827.22K |
| Freddie Mac Multifamily Structured Pass Through Certificates | — | Mortgage / Securitized | 0.05% | $818.57K |
| Freddie Mac Multifamily Structured Pass Through Certificates | — | Mortgage / Securitized | 0.05% | $788.80K |
| OBX 2025-NQM8 Trust | — | Mortgage / Securitized | 0.05% | $756.04K |
| FREMF 2025-K169 Mortgage Trust | — | Mortgage / Securitized | 0.05% | $749.75K |
| Freddie Mac Multifamily Structured Pass Through Certificates | — | Mortgage / Securitized | 0.05% | $679.73K |
| Freddie Mac Multifamily Structured Pass Through Certificates | — | Mortgage / Securitized | 0.04% | $647.13K |
| Freddie Mac Strips | — | Mortgage / Securitized | 0.04% | $560.72K |
| Freddie Mac Multifamily Structured Pass Through Certificates | — | Mortgage / Securitized | 0.04% | $548.65K |
| Freddie Mac Multifamily Structured Pass Through Certificates | — | Mortgage / Securitized | 0.04% | $521.49K |
| BBCMS Trust 2021-C10 | — | Mortgage / Securitized | 0.03% | $507.40K |
| Benchmark 2021-B24 Mortgage Trust | — | Mortgage / Securitized | 0.03% | $488.92K |
| Wells Fargo Commercial Mortgage Trust 2021-C60 | — | Mortgage / Securitized | 0.03% | $482.82K |
| Freddie Mac Multifamily Structured Pass Through Certificates | — | Mortgage / Securitized | 0.03% | $472.18K |
| Long: BM11746 IRS USD R V 12MUSCPI SM11746_FLO CCPINFLATIONZERO / Short: BM11746 IRS USD P F 2.75500 SM11746_FIX CCPINFLATIONZERO | — | Unknown | 0.03% | $455.26K |
| Freddie Mac REMICS | — | Mortgage / Securitized | 0.03% | $442.83K |
| 3650R 2021-PF1 Commercial Mortgage Trust | — | Mortgage / Securitized | 0.03% | $434.78K |
| BBCMS Mortgage Trust 2021-C9 | — | Mortgage / Securitized | 0.03% | $418.96K |
| Freddie Mac REMICS | — | Mortgage / Securitized | 0.03% | $414.85K |
| Freddie Mac Multifamily Structured Pass Through Certificates | — | Mortgage / Securitized | 0.03% | $412.95K |
| Morgan Stanley Capital I Trust 2021-L5 | — | Mortgage / Securitized | 0.03% | $377.55K |
| Colorado St Hlth Facs Auth Revenue | — | Municipal Bonds | 0.03% | $376.93K |
| Government National Mortgage Association | — | Mortgage / Securitized | 0.03% | $374.24K |
| Freddie Mac Multifamily Structured Pass Through Certificates | — | Mortgage / Securitized | 0.03% | $372.48K |
| Fannie Mae REMICS | — | Mortgage / Securitized | 0.03% | $371.80K |
| Morgan Stanley Capital I Trust 2021-L6 | — | Mortgage / Securitized | 0.02% | $369.12K |
| Freddie Mac Multifamily Structured Pass Through Certificates | — | Mortgage / Securitized | 0.02% | $367.55K |
MIATX Sector Allocation
MFS Inflation-Adjusted Bond Fund holdings grouped by sector, by share of the portfolio's market value.
| Sector | Weight | Holdings |
|---|---|---|
| Government Bonds | 89.7% | 22 |
| Mortgage / Securitized | 9.4% | 92 |
| Funds & ETFs | 0.5% | 1 |
| Corporate Bonds | 0.3% | 2 |
| Municipal Bonds | 0.0% | 1 |
| Unknown | 0.1% | 10 |
MIATX Country Allocation
Where MFS Inflation-Adjusted Bond Fund's holdings are domiciled, by percentage of net assets (largest 2).
| Country | % of net assets |
|---|---|
| United States | 98.5% |
| Cayman Islands | 1.4% |
MIATX Portfolio Allocation
Asset-class allocation of MFS Inflation-Adjusted Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 89.9% |
| Securitized | 9.4% |
| Equity | 0.5% |
| Real Estate | 0.1% |
MIATX Debt Constituents
Largest debt holdings of MFS Inflation-Adjusted Bond Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Treasury | 11.27% |
| United States Treasury | 9.60% |
| United States Treasury | 8.89% |
| United States Treasury | 7.66% |
| United States Treasury | 6.53% |
| United States Treasury | 5.40% |
| United States Treasury | 5.00% |
| United States Treasury | 4.60% |
| United States Treasury | 4.34% |
| United States Treasury | 4.15% |
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.