Editor's Note: Any reference to TheStreet Ratings and its underlying recommendation does not reflect the opinion of TheStreet, Inc. or any of its contributors including Jim Cramer or Stephanie Link. All three major indices are trading up today with the Dow Jones Industrial Average ( ^DJI) trading up 16 points (0.1%) at 16,549 as of Thursday, May 22, 2014, 12:55 PM ET. The NYSE advances/declines ratio sits at 2,112 issues advancing vs. 834 declining with 184 unchanged. The Services sector currently sits up 0.6% versus the S&P 500, which is up 0.4%. On the negative front, top decliners within the sector include Apollo Education Group ( APOL), down 8.5%, Vipshop Holdings ( VIPS), down 2.6%, PetSmart ( PETM), down 1.8%, eBay ( EBAY), down 1.0% and TJX Companies ( TJX), down 0.8%. Top gainers within the sector include YY ( YY), up 8.8%, Williams-Sonoma ( WSM), up 8.4%, Dollar Tree Stores ( DLTR), up 7.4%, Zillow ( Z), up 5.1% and Signet Jewelers ( SIG), up 4.5%. TheStreet would like to highlight 3 stocks pushing the sector lower today: 3. Patterson Companies ( PDCO) is one of the companies pushing the Services sector lower today. As of noon trading, Patterson Companies is down $1.24 (-3.0%) to $39.78 on heavy volume. Thus far, 1.6 million shares of Patterson Companies exchanged hands as compared to its average daily volume of 669,700 shares. The stock has ranged in price between $37.02-$40.15 after having opened the day at $38.44 as compared to the previous trading day's close of $41.03. Patterson Companies, Inc. distributes dental, veterinary, and rehabilitation supplies. Patterson Companies has a market cap of $4.2 billion and is part of the wholesale industry. Shares are down 0.4% year-to-date as of the close of trading on Wednesday. Currently there are 2 analysts that rate Patterson Companies a buy, no analysts rate it a sell, and 9 rate it a hold. TheStreet Ratings rates Patterson Companies as a buy. The company's strengths can be seen in multiple areas, such as its revenue growth, largely solid financial position with reasonable debt levels by most measures, growth in earnings per share, good cash flow from operations and increase in stock price during the past year. We feel these strengths outweigh the fact that the company shows low profit margins. Get the full Patterson Companies Ratings Report now. STOCKS TO BUY: TheStreet Quant Ratings has identified a handful of stocks that can potentially TRIPLE in the next 12 months. Learn more.