# MFS Total Return Bond Fund

MFS Total Return Bond Fund is a registered fund series of MFS Series Trust IX (series S000002497). Net assets $8.3B as of 2026-04-30.

## Profile

- Series ID: S000002497
- Registrant: MFS Series Trust IX
- LEI: FJAEEQMSDDUK9QL2E558
- Net assets: $8.3B
- Total assets: $8.4B
- As of: 2026-04-30

## Advisers

- [MASSACHUSETTS FINANCIAL SERVICES COMPANY (Advisor)](https://search.stillhousedata.com/firm/110045)

## Top holdings (200 reported)

_Showing 15 of 200 holdings by value._

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| [United States of America](https://search.stillhousedata.com/security/91282CKA8) | — | $270.9M | 327.97% |
| [United States of America](https://search.stillhousedata.com/security/912810TW8) | — | $174.2M | 210.98% |
| [United States of America](https://search.stillhousedata.com/security/91282CKX8) | — | $168.6M | 204.13% |
| [United States of America](https://search.stillhousedata.com/security/912810TX6) | — | $162.1M | 196.30% |
| [MFS Institutional Money Market Portfolio](https://search.stillhousedata.com/security/55291X109) | — | $126.5M | 153.12% |
| [United States of America](https://search.stillhousedata.com/security/91282CLW9) | — | $102.0M | 123.49% |
| [United States of America](https://search.stillhousedata.com/security/912810TU2) | — | $95.3M | 115.36% |
| [United States of America](https://search.stillhousedata.com/security/91282CJF9) | — | $93.0M | 112.61% |
| [United States of America](https://search.stillhousedata.com/security/912810UE6) | — | $92.3M | 111.75% |
| [FHLMC Pool](https://search.stillhousedata.com/security/3132DWDC4) | — | $89.2M | 108.00% |
| [United States of America](https://search.stillhousedata.com/security/912810TZ1) | — | $85.9M | 104.07% |
| [United States of America](https://search.stillhousedata.com/security/91282CLF6) | — | $71.8M | 86.95% |
| [United States of America](https://search.stillhousedata.com/security/912810SS8) | — | $68.4M | 82.88% |
| [United States of America](https://search.stillhousedata.com/security/91282CHQ7) | — | $64.5M | 78.12% |
| [United States of America](https://search.stillhousedata.com/security/91282CPS4) | — | $56.7M | 68.70% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-04-30 | $8.3B |
| 2026-01-31 | $8.4B |
| 2025-10-31 | $8.4B |
| 2025-07-31 | $8.2B |
| 2025-04-30 | $8.1B |
| 2025-01-31 | $8.2B |
| 2024-10-31 | $8.1B |
| 2024-07-31 | $7.9B |

## More

- [Registrant: MFS Series Trust IX](https://search.stillhousedata.com/registrant/63075)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000002497.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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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.