Company: CIF
Filing Date: 2025-07-28
Form Type: N-CSRS
Source: 0001683863-25-006222
Chunk: 3

Company: MFS INTERMEDIATE HIGH INCOME FUND
Filing Date: 2025-07-28
Form: N-CSRS
Chunk 3
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 in the Notes to Financial Statements for more information on the fund's outstanding borrowings.     |

| (d) | Duration is a measure of how much a bond’s price is likely to fluctuate with general changes in interest rates, e.g., if rates rise 1.00%, a bond with a 5-year duration is             
 likely to lose about 5.00% of its value due to the interest rate move. The Average Duration calculation reflects the impact of the equivalent exposure of derivative positions, if any. |

| (i) | For purposes of this presentation, the components include the value of securities, and reflect the impact of the equivalent exposure of derivative positions, if any. These amounts may                                  
 be negative from time to time. Equivalent exposure is a calculated amount that translates the derivative position into a reasonable approximation of the amount of the underlying asset that the portfolio would have to 
 hold at a given point in time to have the same price sensitivity that results from the portfolio’s ownership of the derivative contract. When dealing with derivatives, equivalent exposure is a more                    
 representative measure of the potential impact of a position on portfolio performance than value. The bond component will include any accrued interest amounts.                                                          |

| (m) | In determining each instrument’s effective maturity for purposes of calculating the fund’s dollar-weighted average effective maturity, MFS uses the instrument’s                                                        
 stated maturity or, if applicable, an earlier date on which MFS believes it is probable that a maturity-shortening feature (such as a put, pre-refunding or prepayment) will cause the instrument to be repaid. Such an 
 earlier date can be substantially shorter than the instrument’s stated maturity.                                                                                                                                        |

| (o) | Less than 0.1%. |

Where the fund holds convertible bonds, they are treated as part of the equity portion of the portfolio. Other includes equivalent exposure from currency derivatives and/or any offsets to derivative positions and may be negative. Percentages are based on net assets as of May 31, 2025. The portfolio is actively managed and current holdings may be different.

2

Portfolio Managers' Profiles

| Portfolio Manager | Primary Role      | Since | Title and Five Year History                                                              |
| David Cole        | Portfolio Manager |  2007 | Investment Officer of MFS; employed in the investment management area of MFS since 2004. |
| Michael Skatrud   | Portfolio Manager |  2018 | Investment Officer of MFS; employed in the investment management area of MFS