Fiduciary/Claymore Energy Infrastructure Fund is a closed ended equity mutual fund launched and managed by Guggenheim Funds Investment Advisors, LLC. It is co-managed by Advisory Research, Inc. The fund invests in the public equity markets of the United States. It seeks to invest in the stocks of companies operating diversified gas infrastructure, midstream oil infrastructure, propane, oil and gas production, coal and marine transportation sectors. The Fund invests at least 80% of its managed assets in master limited partnership (MLP) entities, and at least 65% in equity securities of MLP entities. It benchmarks the performance of its portfolio against the Alerian MLP Index. The fund was formerly known as Fiduciary/Claymore MLP Opportunity Fund. Fiduciary/Claymore Energy Infrastructure Fund was formed on December 22, 2004 and is domiciled in the United States.