Pattern Energy Group Inc PEGI, a power company that focuses on wind, solar and transmission projects in the U.S., has underperformed recently, offering investors an entry point, according to Goldman Sachs. The Analyst Goldman Sachs analyst Brian Lee upgraded shares from Neutral to Buy, with a 12-month price target of $25, suggesting a 22 percent return potential compared to the 11 percent average return of the firm's coverage universe.The Thesis A combination of lower wind production, equity issuance and U.S. tax reform concerns have pressured the shares of Pattern Energy in recent months, Lee said in a note. Given the view these headwinds are transitory in nature, the analyst sees a setup for easier comps and mean revision potential, with respect to weather-impacted production levels.Source