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 down today with the Dow Jones Industrial Average ( ^DJI) trading down 58 points (-0.4%) at 15,461 as of Wednesday, Aug. 7, 2013, 12:50 PM ET. The NYSE advances/declines ratio sits at 785 issues advancing vs. 2,161 declining with 94 unchanged. The Health Services industry currently sits down 1.1% versus the S&P 500, which is down 0.4%. On the negative front, top decliners within the industry include Tenet Healthcare ( THC), down 3.4%, Mindray Medical International ( MR), down 1.8%, Catamaran ( CTRX), down 0.8%, Boston Scientific ( BSX), down 0.8% and Aetna ( AET), down 0.7%. Top gainers within the industry include Tornier N.V ( TRNX), up 20.0%, Varian Medical Systems ( VAR), up 0.8%, Agilent Technologies ( A), up 0.7% and Cigna ( CI), up 0.5%. TheStreet would like to highlight 4 stocks pushing the industry lower today: 4. Steris Corporation ( STE) is one of the companies pushing the Health Services industry lower today. As of noon trading, Steris Corporation is down $1.89 (-4.2%) to $43.65 on heavy volume. Thus far, 331,066 shares of Steris Corporation exchanged hands as compared to its average daily volume of 276,300 shares. The stock has ranged in price between $43.02-$45.22 after having opened the day at $44.55 as compared to the previous trading day's close of $45.54. STERIS Corporation develops, manufactures, and markets infection prevention, contamination control, microbial reduction, and procedural support products and services for healthcare, pharmaceutical, scientific, research, industrial, and governmental customers worldwide. Steris Corporation has a market cap of $2.7 billion and is part of the health care sector. Shares are up 31.1% year to date as of the close of trading on Tuesday. Currently there is 1 analyst that rates Steris Corporation a buy, no analysts rate it a sell, and 5 rate it a hold. TheStreet Ratings rates Steris Corporation as a buy. The company's strengths can be seen in multiple areas, such as its revenue growth, solid stock price performance, notable return on equity, reasonable valuation levels and good cash flow from operations. Although the company may harbor some minor weaknesses, we feel they are unlikely to have a significant impact on results. Get the full Steris Corporation 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.