Portfolio manager Brian Kessens of Tortoise Ecofin, who oversees the closed-end Tortoise Pipeline and Energy, and the Tortoise Power and Energy Infrastructure Fund, says he expects double-digit total returns from midstream and other energy companies based on current high yields, supported by stock buybacks and debt paydowns. The energy sector had a rocky time through 2020 and has rebounded sharply, but Kessens says valuations generally remain reasonable and that 'as the market starts to appreciate some of these growth opportunities, there's further upside ahead.'