The Business Services group has plenty of great stocks, but investors should always be looking for companies that are outperforming their peers. Has ExlService Holdings (EXLS) been one of those stocks this year? By taking a look at the stock's year-to-date performance in comparison to its Business Services peers, we might be able to answer that question.ExlService Holdings is a member of the Business Services sector. This group includes 272 individual stocks and currently holds a Zacks Sector Rank of #7. Th ...