# MFS Inflation-Adjusted Bond Fund

MFS Inflation-Adjusted Bond Fund is a registered fund series of MFS Series Trust IX (series S000002493). Net assets $1.5B as of 2026-04-30.

## Profile

- Series ID: S000002493
- Registrant: MFS Series Trust IX
- LEI: VOHO802M9IKG3IZTEN75
- Net assets: $1.5B
- Total assets: $1.5B
- As of: 2026-04-30

## Advisers

- [Massachusetts Financial Services Company (Advisor)](https://search.stillhousedata.com/firm/110045)

## Top holdings (117 reported)

_Showing 15 of 117 holdings by value._

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| [United States Treasury](https://search.stillhousedata.com/security/91282CBF7) | — | $171.7M | 1135.95% |
| [United States Treasury](https://search.stillhousedata.com/security/912828ZZ6) | — | $144.0M | 953.04% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CJY8) | — | $117.2M | 775.46% |
| [United States Treasury](https://search.stillhousedata.com/security/9128285W6) | — | $114.6M | 758.21% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CDX6) | — | $98.2M | 649.80% |
| [United States Treasury](https://search.stillhousedata.com/security/912810QV3) | — | $82.8M | 547.92% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CGK1) | — | $75.5M | 499.55% |
| [United States Treasury](https://search.stillhousedata.com/security/912810FD5) | — | $72.2M | 477.85% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CHP9) | — | $69.6M | 460.29% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CPH8) | — | $62.5M | 413.52% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CNB3) | — | $59.1M | 390.96% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CPU9) | — | $48.3M | 319.85% |
| [United States Treasury](https://search.stillhousedata.com/security/91282CLE9) | — | $41.2M | 272.36% |
| [United States Treasury](https://search.stillhousedata.com/security/912810RL4) | — | $39.7M | 262.55% |
| [United States Treasury](https://search.stillhousedata.com/security/912810TY4) | — | $31.1M | 206.00% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-04-30 | $1.5B |
| 2026-01-31 | $1.5B |
| 2025-10-31 | $1.6B |
| 2025-07-31 | $1.5B |
| 2025-04-30 | $1.4B |
| 2025-01-31 | $1.5B |
| 2024-10-31 | $1.5B |
| 2024-07-31 | $1.5B |

## More

- [Registrant: MFS Series Trust IX](https://search.stillhousedata.com/registrant/63075)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000002493.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

---

Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.