The Utilities group has plenty of great stocks, but investors should always be looking for companies that are outperforming their peers. Has Southwest Gas (SWX) been one of those stocks this year? By taking a look at the stock's year-to-date performance in comparison to its Utilities peers, we might be able to answer that question.Southwest Gas is a member of the Utilities sector. This group includes 106 individual stocks and currently holds a Zacks Sector Rank of #1. The Zacks Sector Rank considers 16 diff ...