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 42 points (-0.3%) at 15,487 as of Wednesday, Sept. 18, 2013, 12:55 PM ET. The NYSE advances/declines ratio sits at 930 issues advancing vs. 1,976 declining with 128 unchanged. The Computer Software & Services industry currently is unchanged today versus the S&P 500, which is down 0.2%. A company within the industry that fell today was Cerner Corporation ( CERN), up 1.0%. A company within the industry that increased today was ServiceNow ( NOW), up 3.8%. TheStreet would like to highlight 5 stocks pushing the industry lower today: 5. Catamaran ( CTRX) is one of the companies pushing the Computer Software & Services industry lower today. As of noon trading, Catamaran is down $2.40 (-4.3%) to $52.96 on heavy volume. Thus far, 1.3 million shares of Catamaran exchanged hands as compared to its average daily volume of 1.3 million shares. The stock has ranged in price between $52.45-$55.19 after having opened the day at $55.07 as compared to the previous trading day's close of $55.36. Catamaran Corporation provides pharmacy benefit management (PBM) services and healthcare information technology (HCIT) solutions to the healthcare benefits management industry in North America. The company operates in two segments: PBM and HCIT. Catamaran has a market cap of $11.4 billion and is part of the health care sector. Shares are up 17.8% year to date as of the close of trading on Tuesday. Currently there are 13 analysts that rate Catamaran a buy, no analysts rate it a sell, and 3 rate it a hold. TheStreet Ratings rates Catamaran 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, good cash flow from operations, compelling growth in net income and growth in earnings per share. We feel these strengths outweigh the fact that the company has had somewhat disappointing return on equity. Get the full Catamaran 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.