First Trust North American Energy Infrastructure Fund(AMEX:EMLP)

EMLP is one of the actively-managed ETPs in the MLP segment. While other MLP funds are structured as C-corporations to circumvent the rule that open-ended funds can't hold more than 25% of their portfolios in MLPs, EMLP is structured as a traditional 1940 Act fund. To maintain that structure, the issuer has extended the universe to include pipelines and utilities structured as C-corporations, Canadian firms that used to be royalty trusts, and unique institutional MLP shares issued by MLP affiliates. It's therefore not a pure MLP play, and adds complexity to its portfolio: some underlying MLPs make distributions in shares rather than cash, which may explain the fund's lower yield.