MFS® U.S. Government Money Market Fund

Effective February 27, 2009, new purchases into this fund have been suspended. Please see the prospectus for more information on purchase restrictions.

Holdings Characteristics

Holdings Based Portfolio - Fixed Income Level Data

As of 5/31/17

# of Bond Holdings
Average Coupon
Average Effective Duration
0.00 yrs
Average Effective Maturity
Yield to Worst

Performance Statistics

No data available

Top 10 Holdings

As of 5/31/17

Goldman Sachs Group Inc Repo 0.80 JUN 01 17
Fannie Mae 0.755 Jun 01 17
Fannie Mae 0.741 Jun 01 17
Us Treasury Bill 0.765 Jul 06 17
Federal Home Loan Bank 0.815 Jun 28 17
Federal Home Loan Bank 0.944 Aug 11 17
Freddie Mac 0.720 Jun 22 17
Fannie Mae 0.925 Aug 23 17
Fannie Mae 0.74 Jun 14 17
Federal Farm Credit Bank 0.73 Jun 09 17

41.90% of total net assets

Total number of holdings: 43

Full and Historical Holdings

Money Market Fund Reports

Monthly Portfolio Holding Reports:

1The fund files monthly portfolio information with the Securities and Exchange Commission (SEC) on Form N-MFP. The fund files monthly portfolio information on Form N-MFP as of the last business day of the month no later than the fifth business day of the following month. Prior to April 14, 2016, the funds Form N-MFP became publicly available on the SECs website 60 days after the filing date. For filings made after April 14, 2016, the funds filings on Form N-MFP will be immediately available on the SECs website.

*By selecting the link, you will be directed to the corresponding filing on the SEC website.

Portfolio Structure %

As of 5/31/17

Credit Quality %

As of 5/31/17

% of Total Net Assets

Important Characteristics Information

Portfolio characteristic data are based on unaudited net assets.

The portfolio is actively managed, and current holdings may be different.

Ratings are assigned to portfolio securities utilizing ratings from Moody's, Fitch, and Standard & Poor's rating agencies and applying the following hierarchy: If all three agencies provide a rating, the middle rating (after dropping the highest and lowest ratings) is assigned; if two of the three agencies rate a security, the lower of the two is assigned. Cash and other portfolio assets that are not securities are not included in the categories mentioned above. Ratings are shown in the S&P scale. All ratings are subject to change.

Portfolio characteristics are based on equivalent exposure, which measures how a portfolio's value would change due to price changes in an asset held either directly or, in the case of a derivative contract, indirectly. The market value of the holding may differ.


Average Coupon: Average Coupon is the equivalent exposure weighted coupon of all interest bearing instruments as a percent of the total equivalent exposure of all fixed income holdings, including short term and interest rate derivatives which have coupons. Coupons are netted for securities with a payable and receivable leg. Non-accruing securities are treated as having a coupon equal to zero.

Average Effective Duration: Average Effective 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.

Average Effective Maturity: Average effective maturity is a weighted average of maturity of the bonds held in a portfolio, taking into account any prepayments, puts, and adjustable coupons which may shorten the maturity. Longer-maturity funds are generally considered more interest-rate sensitive than shorter maturity funds.

Yield to Worst: The weighted average yield-to-worst of all portfolio holdings. The yield-to-worst is computed by using the lower of either yield-to-maturity or the yield-to-call on every possible call date. Essentially the yield-to-worst is a bond's yield-to-maturity under the least desirable bond repayment pattern under the assumption that bond market yields are unchanged.

This publication is authorized for distribution only when preceded or accompanied by a prospectus, or summary prospectus, for the portfolio being offered. Consider the fund's investment objectives, risks, charges and expenses. Contact MFS or view online. Read it carefully.