Strategy. MFS (Massachusetts Financial Services Company, the funds investment adviser) normally invests at least 80% of the funds net assets in U.S. and foreign government securities. MFS normally invests the funds assets primarily in debt instruments of the U.S. Government and of foreign governments in developed countries. MFS normally invests the fund's assets across different countries and regions, but MFS may invest more than 25% of the funds assets in one country or a limited number of countries. MFS generally invests the fund's assets in at least three different countries and invests a percentage of the fund's net assets in securities of foreign issuers equal to at least the lesser of 40% or the percentage of foreign issuers in the JPMorgan … Show more… MFS (Massachusetts Financial Services Company, the funds investment adviser) normally invests at least 80% of the funds net assets in U.S. and foreign government securities. MFS normally invests the funds assets primarily in debt instruments of the U.S. Government and of foreign governments in developed countries. MFS normally invests the fund's assets across different countries and regions, but MFS may invest more than 25% of the funds assets in one country or a limited number of countries. MFS generally invests the fund's assets in at least three different countries and invests a percentage of the fund's net assets in securities of foreign issuers equal to at least the lesser of 40% or the percentage of foreign issuers in the JPMorgan Global Government Bond Index (Unhedged) less 15%. MFS primarily invests the funds assets in investment grade quality debt instruments, but may also invest the funds assets in below investment grade quality debt instruments. The fund is a non-diversified fund. This means that MFS may invest a significant percentage of the funds assets in a single issuer or a small number of issuers. While MFS may use derivatives for any investment purpose, to the extent MFS uses derivatives, MFS expects to use derivatives primarily to increase or decrease exposure to a particular market, segment of the market, or security, to increase or decrease interest rate or currency exposure, or as alternatives to direct investments. Derivatives include futures, forward contracts, options, and swaps. MFS allocates the fund's assets across countries primarily based on fundamental economic and financial analysis of the creditworthiness of each country and the relative values of countries' external debt, currencies, and local market debt. In selecting investments, MFS may consider economic and financial fundamentals, liquidity, duration, yield curve positioning, relative value, and other factors. Quantitative tools that systematically evaluate these and other factors may also be considered. For purposes of the fund's 80% policy, net assets include the amount of any borrowings for investment purposes. Show less