This document discusses the success of MLPs (master limited partnerships) which are partnerships that trade like stocks. Some key points: - MLPs have seen strong profits and returns in recent years, outperforming indexes. Specific MLPs and recommendations have seen even higher returns. - MLPs have benefited from factors like the US shale oil and gas revolution, favorable tax rules, and operating across a huge transcontinental market in North America. - The document recommends continuing to invest in MLPs and lists developing themes like growing gas and petrochemical exports as factors that can lead to further success.