Editor's Note: TheStreet ratings do not represent the views of TheStreet's staff or its contributors. Ratings are established by computer based on metrics for performance (which includes growth, stock performance, efficiency and valuation) and risk (volatility and solvency). Companies with poor cash flow or high debt levels tend to earn lower ratings in our model All three major indices are trading down today with the Dow Jones Industrial Average ( ^DJI) trading down 62 points (-0.4%) at 14,778 as of Wednesday, May 1, 2013, 12:50 PM ET. The NYSE advances/declines ratio sits at 958 issues advancing vs. 1,966 declining with 114 unchanged. The Health Services industry currently sits down 0.78 versus the S&P 500, which is down 0.42. Top gainers within the industry include PerkinElmer ( PKI), up 2.2%, and Medtronic ( MDT), up 0.6%. On the negative front, top decliners within the industry include Vanguard Health Systems ( VHS), down 7.18, Opko Health ( OPK), down 4.63, Mettler-Toledo International ( MTD), down 3.09, Mindray Medical International ( MR), down 1.85 and HCA Holdings ( HCA), down 1.23. TheStreet Ratings group would like to highlight 4 stocks pushing the industry higher today: 4. Parexel International Corporation ( PRXL) is one of the companies pushing the Health Services industry higher today. As of noon trading, Parexel International Corporation is up $2.23 (5.45) to $43.18 on heavy volume Thus far, 686,478 shares of Parexel International Corporation exchanged hands as compared to its average daily volume of 473,100 shares. The stock has ranged in price between $40.73-$43.25 after having opened the day at $41.46 as compared to the previous trading day's close of $40.95. 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 $2.4 billion and is part of the health care sector. The company has a P/E ratio of 31.8, above the S&P 500 P/E ratio of 17.7. Shares are up 37.4% year to date as of the close of trading on Tuesday. Currently there are 5 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. Exclusive Offer: Jim Cramer's 'go-to' small/mid-cap guru Bryan Ashenberg only buys stocks he thinks could return 50-100%. See his top picks for 14-days FREE.