The past year has been brutal for investors in Algonquin Power & Utilities (NYSE: AQN). The utility has lost half its value because of deteriorating financial performance and concerns about its balance sheet because of its pending acquisition of AEP's Kentucky Power assets. Those issues have also weighed on shares of Atlantica Sustainable Infrastructure (NASDAQ: AY). That's because Algonquin is the largest shareholder of the renewable energy and sustainable infrastructure owner. 

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Source Fool.com