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 8/31/15

# 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 8/31/15

Freddie Mac 0.05 Sep 09 15
Us Treasury Bill 0.275 Jan 07 16
Federal Home Loan Bank 0.145 Oct 21 15
Federal Home Loan Bank 0.153 Oct 16 15
Us Treasury Bill 0.035 Sep 17 15
Federal Home Loan Bank 0.06 Sep 16 15
Federal Home Loan Bank 0.065 Sep 04 15
Federal Home Loan Bank 0.047 Sep 09 15
Federal Home Loan Bank 0.067 Sep 16 15

39.84% of total net assets

Total number of holdings: 48

Full and Historical Holdings
Monthly Fund Holdings

Portfolio Structure %

As of 8/31/15

Credit Quality %

As of 8/31/15

% 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.

1 The assets included in "Other" carry risks including market, credit, counterparty, currency and liquidity risks. The inclusion of these assets may understate or overstate the fund's actual cash position.


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.