Midstream stocks had a strong first half, but the second half may be even brighter.Pipeline and midstream energy stocks have had a strong start to 2024. This can been seen in the performance of major sector exchange-traded funds (ETFs) such as the Alerian Energy Infrastructure ETF (ENFR 0.47%), up about 18% year to date, and the Alerian MLP ETF (AMLP 0.59%), up nearly 17%. The latter only includes the stocks of midstream companies structured as master limited partnerships (MLPs), while the former includes m ...