Even for Americans living outside of the service areas of giant utilities companies, they’ve earned a reputation for market dominance. NextEra Energy NYSE: NEE, Southern Company NYSE: SO, and Duke Energy NYSE: DUK command a collective market cap of $344.24 billion and have been reliable investments.   Dominion Energy TodayDDominion Energy$58.41 -0.44 (-0.75%) 52-Week Range$48.07▼$62.46Dividend Yield4.57%P/E Ratio20.16Price Target$59.57Add to WatchlistDominion Energy NYSE: D has a market cap of nearly $50 b ...