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 77 points (-0.5%) at 16,493 as of Tuesday, Aug. 5, 2014, 12:55 PM ET. The NYSE advances/declines ratio sits at 1,020 issues advancing vs. 1,966 declining with 149 unchanged. The Health Services industry currently is unchanged today versus the S&P 500, which is down 0.6%. On the negative front, top decliners within the industry include Ironwood Pharmaceuticals ( IRWD), down 7.6%, Health Net ( HNT), down 3.4%, Grifols ( GRFS), down 2.5%, UnitedHealth Group ( UNH), down 1.4% and Humana ( HUM), down 0.7%. A company within the industry that increased today was Fresenius Medical Care AG & Co. KGaA ( FMS), up 2.4%. TheStreet would like to highlight 3 stocks pushing the industry lower today: 3. Aetna ( AET) is one of the companies pushing the Health Services industry lower today. As of noon trading, Aetna is down $1.02 (-1.3%) to $78.58 on average volume. Thus far, 862,051 shares of Aetna exchanged hands as compared to its average daily volume of 2.2 million shares. The stock has ranged in price between $78.50-$79.78 after having opened the day at $79.48 as compared to the previous trading day's close of $79.60. Aetna Inc. operates as a diversified health care benefits company in the United States. The company operates in three segments: Health Care, Group Insurance, and Large Case Pensions. Aetna has a market cap of $27.9 billion and is part of the health care sector. Shares are up 16.1% year-to-date as of the close of trading on Monday. Currently there are 11 analysts that rate Aetna a buy, no analysts rate it a sell, and 6 rate it a hold. TheStreet Ratings rates Aetna as a buy. The company's strengths can be seen in multiple areas, such as its robust revenue growth, solid stock price performance, attractive valuation levels, good cash flow from operations and increase in net income. We feel these strengths outweigh the fact that the company shows low profit margins. Get the full Aetna 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.