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 84 points (-0.5%) at 15,367 as of Wednesday, Aug. 14, 2013, 12:50 PM ET. The NYSE advances/declines ratio sits at 1,073 issues advancing vs. 1,847 declining with 114 unchanged. The Health Services industry currently is unchanged today versus the S&P 500, which is down 0.3%. On the negative front, top decliners within the industry include Mindray Medical International ( MR), down 2.0%, Agilent Technologies ( A), down 0.9% and Aetna ( AET), down 0.7%. Top gainers within the industry include Alere ( ALR), up 2.6%, Medtronic ( MDT), up 0.7% and Fresenius Medical Care AG & Co. KGaA ( FMS), up 0.5%. TheStreet would like to highlight 4 stocks pushing the industry lower today: 4. Parexel International Corporation ( PRXL) is one of the companies pushing the Health Services industry lower today. As of noon trading, Parexel International Corporation is down $1.91 (-3.7%) to $49.42 on heavy volume. Thus far, 397,197 shares of Parexel International Corporation exchanged hands as compared to its average daily volume of 512,300 shares. The stock has ranged in price between $48.58-$50.00 after having opened the day at $49.79 as compared to the previous trading day's close of $51.33. PAREXEL International Corporation, a biopharmaceutical services company, provides clinical research, medical communications, consulting, commercialization, and advanced technology products and services to the pharmaceutical, biotechnology, and medical device industries worldwide. Parexel International Corporation has a market cap of $2.9 billion and is part of the health care sector. Shares are up 72.1% year to date as of the close of trading on Tuesday. Currently there are 6 analysts that rate Parexel International Corporation a buy, no analysts rate it a sell, and 3 rate it a hold. TheStreet Ratings rates Parexel International Corporation as a buy. The company's strengths can be seen in multiple areas, such as its robust revenue growth, solid stock price performance, impressive record of earnings per share growth, compelling growth in net income and notable return on equity. We feel these strengths outweigh the fact that the company shows low profit margins. Get the full Parexel International 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.