DoubleLine ETF Trust - DoubleLine Mortgage ETF is an exchange traded fund launched and managed by DoubleLine ETF Adviser LP. The fund invests in fixed income markets of the United States. The fund invests in investment grade residential mortgage-backed securities and other residential mortgage-related securities issued and guaranteed by the U.S. government, its agencies, instrumentalities or sponsored corporations such as the government national mortgage association, the federal national mortgage association or the federal home loan mortgage corporation. The fund invests in securities with a dollar-weighted average effective duration within two years. It seeks to benchmark the performance of its portfolio against the Bloomberg US Mortgage-Backed Securities (MBS) Index and the Bloomberg US Aggregate Bond Index. DoubleLine ETF Trust - DoubleLine Mortgage ETF was formed on March 31, 2023 and is domiciled in the United States.