The Business Services group has plenty of great stocks, but investors should always be looking for companies that are outperforming their peers. ABM Industries (ABM) is a stock that can certainly grab the attention of many investors, but do its recent returns compare favorably to the sector as a whole? 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.ABM Industries is a member of our Business Services group, which ...