SPEM invests in securities and ADRs/GDRs of companies domiciled in emerging markets, excluding South Korea, as it considers this to be a developed market (a different perspective taken up by many funds in this space). SSgA fund management uses a sampling method to provide exposure. This means the fund may not hold all the stocks of the index but a representative collection of securities resulting in a similar investment profile. Stocks selected are weighted proportionally to their float-adjusted market capitalization. The Index is reconstituted annually in September and rebalances quarterly to allow for the inclusion of eligible initial public offerings. Prior to October 16, 2017 the fund traded under the name SPDR S&P Emerging Market and ticker (GMM).