Shares of NextEra Energy (NEE) have gained 21.3% in a year compared with its Zacks Utility - Electric Power industry’s rally of 14.4%. The company has also outperformed the Zacks Utilities sector in the same time frame.Stay up-to-date with all quarterly releases: See Zacks Earnings Calendar.The steady rise in NextEra Energy’s share prices is a reflection of the strong performance of the company and customer growth, which is boosting demand for its services. The decline in interest rates is also going to boo ...