MPHUX — MassMutual High Yield Fund
Data updated: 2026-08-27
MPHUX — MassMutual High Yield Fund. Short Corporate Bond · $554.99M AUM · 0.13% expense ratio. Holdings, fees, performance and SEC filings.
MPHUX Fund Overview
MPHUX — MassMutual High Yield Fund is a US mutual fund managed by Massmutual Premier Funds, categorised as Short Corporate Bond. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Massmutual Premier Funds
- Category: Short Corporate Bond
- Assets under management: $554.99M
- Ticker: MPHUX
- SEC CIK: 0000927972
- SEC series ID: S000003779
- Share class ID: C000271047
MPHUX Investment Objective and Strategy
MassMutual High Yield Fund describes its objective and strategy as follows, from its latest prospectus filed with the SEC by Massmutual Premier Funds.
Investment objective
This Fund seeks to achieve a high level of total return, with an emphasis on current income, by investing primarily in high yield debt and related securities.
Principal investment strategy
The Fund invests primarily in lower rated U.S. debt securities (junk or high yield bonds), including securities in default. Debt securities may include, for example, corporate bonds, mortgage-backed and asset-backed securities, and obligations of the U.S. Government or its agencies or instrumentalities. Under normal circumstances, the Fund invests at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in lower rated fixed income securities (rated below Baa3 by Moodys, below BBB- by Standard & Poors or the equivalent by any NRSRO (using the lower rating) or, if unrated, determined to be of below investment grade quality by the Funds subadviser, Barings LLC (Barings). The Fund may also invest in convertible securities, preferred stocks, warrants, bank loans, and other fixed income securities, including Rule 144A securities, of both U.S.
and foreign issuers. Currently, Barings does not expect that the Fund will invest more than 20% of its total assets in bank loans. The Fund may invest up to 15% of its total assets in securities that are not denominated in U.S. dollars including, but not limited to, corporate bonds, government and agency issues, Rule 144A securities, convertible securities, bank loans, mortgage-backed, and asset-backed securities. In pursuing its investment objective, the Fund may (but is not obligated to) use a wide variety of exchange-traded and over-the-counter derivatives, including futures contracts (for hedging purposes, to adjust various portfolio characteristics, including the duration (interest rate volatility) of the Funds portfolio, or as a substitute for direct investments); interest rate swaps (for hedging purposes or as a substitute for direct investments); total return swaps (for hedging purposes); and credit default swaps (for hedging purposes, to adjust various portfolio characteristics, including the duration (interest rate volatility) of the Funds portfolio, or as a substitute for direct investments).
Use of derivatives by the Fund may create investment leverage. The Fund may enter into repurchase agreement transactions. The Fund may hold a portion of its assets in cash or cash equivalents. The Fund may enter into reverse repurchase agreement transactions. Under normal market conditions, the Fund expects to have a dollar-weighted average portfolio maturity ranging from 4 to 10 years. The Funds portfolio may include securities with maturities outside this range, and the range may change from time to time. In selecting the Funds investments, Barings employs a bottom-up, fundamental approach to its credit analysis, which focuses first on a specific issuers financial strength, among other things, before considering trends or macro economic factors. Barings prefers companies that it believes possess one or more of the following characteristics: strong business position, ability to generate free cash flow to repay debt, favorable capital structure, high level of fixed assets, conservative accounting, and respected management or equity sponsor(s) (such management and sponsors would have a good reputation and/or have had prior positive relations with Barings).
The Fund expects that it will engage in active and frequent trading and so will typically have a relatively high portfolio turnover rate.
MPHUX Holdings
Top 10 holdings of MassMutual High Yield Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| State Street Global Advisors | 4.46% |
| Superior Plus/gen Prtnr | 1.71% |
| Sunoco LP | 1.67% |
| Itt Holdings LLC | 1.66% |
| Seaspan Corp. Pte Ltd. | 1.62% |
| First Quantum Minerals L | 1.56% |
| Pra Group, Inc. | 1.56% |
| California Buyer/atlanti | 1.42% |
| Jefferson Capital Holdin | 1.30% |
| Team Health Holdings, Inc. | 1.21% |
MPHUX Portfolio Allocation
Asset-class allocation of MassMutual High Yield Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Fixed Income | 92.0% |
| Cash & Equivalents | 8.2% |
| Loans | 4.0% |
| Equity | 0.1% |
MPHUX Performance
Total returns for MPHUX (as of 2026-10-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 2.4% |
| 1 year | 6.1% |
| 3 years (annualised) | 9.0% |
| 5 years (annualised) | 4.2% |
MPHUX Risk Information
Risk metrics for MPHUX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 2.1%
MPHUX Costs and Fees
MPHUX costs about $13 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.13%
- Gross expense ratio: 0.60%
- Portfolio turnover: 97%
- Brokerage commissions: 0.09 bps of average net assets (SEC N-CEN)
MPHUX Cashflows
Over the 12 months to 2026-06, MassMutual High Yield Fund had net inflows of $104.33M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $10.36M |
| 2026-05 | $11.50M |
| 2026-04 | $20.22M |
| 2026-03 | −$33.70M |
| 2026-02 | $9.97M |
| 2026-01 | $5.14M |
MPHUX Debt Constituents
Largest debt holdings of MassMutual High Yield Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| Superior Plus/gen Prtnr | 1.71% |
| Sunoco LP | 1.67% |
| Itt Holdings LLC | 1.66% |
| Seaspan Corp. Pte Ltd. | 1.62% |
| First Quantum Minerals L | 1.56% |
| Pra Group, Inc. | 1.56% |
| California Buyer/atlanti | 1.42% |
| Jefferson Capital Holdin | 1.30% |
| Team Health Holdings, Inc. | 1.21% |
| Arcosa, Inc. | 1.02% |
MPHUX Prospectus and SEC Filings
Official MassMutual High Yield Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-01-30
- Prospectus (485BPOS) — filed 2025-01-31
- Prospectus (485BPOS) — filed 2024-02-01
- Portfolio holdings (N-PORT) — filed 2026-08-27
- Portfolio holdings (N-PORT) — filed 2026-05-27
- Portfolio holdings (N-PORT) — filed 2026-02-26
- Annual census (N-CEN) — filed 2025-12-12
- Annual census (N-CEN) — filed 2024-12-13
Related Funds
Other Short Corporate Bond funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.