In the current session, the stock is trading at $412.25, after a 0.77% spike. Over the past month, Quanta Services Inc. (NYSE:PWR) stock increased by 10.61%, and in the past year, by 38.56%. With performance like this, long-term shareholders are optimistic but others are more likely to look into the price-to-earnings ratio to see if the stock might be overvalued.Quanta Services P/E Compared to CompetitorsThe P/E ratio is used by long-term shareholders to assess the company's market performance against aggre ...