Eric Purington, portfolio manager for the Aberdeen Global Infrastructure Income Fund, says that two mega-mergers outside of the infrastructure space -- deals involving upstream energy giants Exxon and Chevron -- have a lot of implications for middle-market/midstream energy companies and infrastructure stocks. Purington says that the larger energy companies are now poised to make big investments, which will trickle down to infrastructure and services companies, but adds that these big deals have opened the door to other mergers at all levels of the industry, which should make for opportunity ahead. Says Purington: "With the leaders in the space doing it, that is going to work it's way down."