 The ALPS Alerian MLP ETF NYSEArca: AMLP is up 44.52 year-to-date, and as if thats not enough, the king of master limited partnership MLP exchange traded funds yields a tantalizing 9.21. Alone, those two data points would be enough to allure most investors, but those factoids shouldnt overshadow midstream energys increasing opportunity set in the . 