In the current session, the stock is trading at $173.84, after a 2.17% spike. Over the past month, Targa Resources Inc. TRGP stock increased by 5.25%, and in the past year, by 18.82%. 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.Targa Resources P/E Compared to CompetitorsThe P/E ratio is used by long-term shareholders to assess the company's market performance against aggregate ma ...