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 One out of the three major indices are trading up today with the Dow Jones Industrial Average ( ^DJI) trading up 13 points (0.1%) at 15,338 as of Friday, May 31, 2013, 12:50 PM ET. The NYSE advances/declines ratio sits at 963 issues advancing vs. 1,995 declining with 88 unchanged. The Health Services industry currently sits up 0.1% versus the S&P 500, which is down 0.09. On the negative front, top decliners within the industry include Humana ( HUM), down 2.44, ResMed ( RMD), down 1.89, Aetna ( AET), down 1.57, Fresenius Medical Care AG & Co. KGaA ( FMS), down 1.40 and WellPoint ( WLP), down 1.20. A company within the industry that increased today was Hologic ( HOLX), up 1.48. TheStreet Ratings group would like to highlight 5 stocks pushing the industry lower today: 5. Intuitive Surgical ( ISRG) is one of the companies pushing the Health Services industry lower today. As of noon trading, Intuitive Surgical is down $5.03 (-1.0%) to $499.65 on light volume Thus far, 80,989 shares of Intuitive Surgical exchanged hands as compared to its average daily volume of 502,600 shares. The stock has ranged in price between $499.03-$503.76 after having opened the day at $503.15 as compared to the previous trading day's close of $504.68. Intuitive Surgical, Inc. designs, manufactures, and markets da Vinci surgical systems, and related instruments and accessories. Intuitive Surgical has a market cap of $20.0 billion and is part of the health care sector. The company has a P/E ratio of 29.3, above the S&P 500 P/E ratio of 17.7. Shares are up 1.7% year to date as of the close of trading on Thursday. Currently there are 11 analysts that rate Intuitive Surgical a buy, 1 analyst rates it a sell, and 3 rate it a hold. TheStreet Ratings rates Intuitive Surgical as a buy. The company's strengths can be seen in multiple areas, such as its robust revenue growth, largely solid financial position with reasonable debt levels by most measures, impressive record of earnings per share growth, compelling growth in net income and good cash flow from operations. We feel these strengths outweigh the fact that the company has had lackluster performance in the stock itself. Get the full Intuitive Surgical 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.