Investors interested in Business Services stocks should always be looking to find the best-performing companies in the group. Has GDS Holdings (GDS) been one of those stocks this year? A quick glance at the company's year-to-date performance in comparison to the rest of the Business Services sector should help us answer this question.GDS Holdings is one of 305 companies in the Business Services group. The Business Services group currently sits at #4 within the Zacks Sector Rank. The Zacks Sector Rank gauges ...