Investors interested in Business Services stocks should always be looking to find the best-performing companies in the group. Has Allot Communications (ALLT) 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.Allot Communications is one of 315 companies in the Business Services group. The Business Services group currently sits at #5 within the Zacks Sector Rank. The Zacks Sector R ...