Why is NextEra Energy buying Dominion Energy and a shale gas firm in the same week?

In one week, NextEra Energy agreed to buy Dominion Energy for $67 billion and shale producer Caliber Resource Partners for $1.3 billion. The back-to-back deals are a masterclass in vertical integration: securing a scarce, mission-critical input ahead of demand. Here is what mid-market operators should take from it.