SPDR® Nuveen Bloomberg Municipal Bond ETF (State Street SPDR Nuveen ICE Municipal Bond) 

The fund invests substantially all, but at least 80%, of its total assets in the securities comprising the index and in securities that the Sub-Adviser determines have economic characteristics that are substantially identical to the economic characteristics of the securities that comprise the index. The index is designed to track the U.S. fully tax-exempt bond market.