All three major indices are trading up today with the Dow Jones Industrial Average ( ^DJI) trading up 76 points (0.5%) at 15,300 as of Tuesday, July 9, 2013, 12:50 PM ET. The NYSE advances/declines ratio sits at 2,101 issues advancing vs. 849 declining with 106 unchanged. The Health Services industry currently sits down 0.5% versus the S&P 500, which is up 1.2%. A company within the industry that fell today was Abbott Laboratories ( ABT), up 0.9%. A company within the industry that increased today was Fresenius Medical Care AG & Co. KGaA ( FMS), up 1.3%. TheStreet would like to highlight 3 stocks pushing the industry lower today: 3. Quest Diagnostics ( DGX) is one of the companies pushing the Health Services industry lower today. As of noon trading, Quest Diagnostics is down $3.18 (-5.2%) to $58.06 on heavy volume. Thus far, 2.7 million shares of Quest Diagnostics exchanged hands as compared to its average daily volume of 1.3 million shares. The stock has ranged in price between $56.81-$59.39 after having opened the day at $56.98 as compared to the previous trading day's close of $61.24. Quest Diagnostics Incorporated provides diagnostic testing information services in the United States and internationally. The company operates in two businesses, Diagnostic Information Services and Diagnostic Solutions. Quest Diagnostics has a market cap of $9.6 billion and is part of the health care sector. Shares are up 5.1% year to date as of the close of trading on Monday. Currently there is 1 analyst that rates Quest Diagnostics a buy, 2 analysts rate it a sell, and 12 rate it a hold. TheStreet Ratings rates Quest Diagnostics as a buy. The company's strengths can be seen in multiple areas, such as its expanding profit margins, largely solid financial position with reasonable debt levels by most measures, notable return on equity and increase in stock price during the past year. We feel these strengths outweigh the fact that the company shows weak operating cash flow. Get the full Quest Diagnostics 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.