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 Utilities sector currently sits down 0.2% versus the S&P 500, which is down 0.2%. On the negative front, top decliners within the sector include Huaneng Power International ( HNP), down 1.6%, and Centrais Eletricas Brasileiras ( EBR.B), down 1.1%. A company within the sector that increased today was Praxair ( PX), up 0.7%. TheStreet would like to highlight 3 stocks pushing the sector lower today: 3. Calpine ( CPN) is one of the companies pushing the Utilities sector lower today. As of noon trading, Calpine is down $0.29 (-1.5%) to $19.31 on light volume. Thus far, 696,104 shares of Calpine exchanged hands as compared to its average daily volume of 2.8 million shares. The stock has ranged in price between $19.19-$19.54 after having opened the day at $19.52 as compared to the previous trading day's close of $19.60. Calpine Corporation, a wholesale power generation company, owns and operates natural gas-fired and geothermal power plants in North America. It operates natural gas-fired combustion turbines and renewable geothermal conventional steam turbines, as well as cogeneration power plants. Calpine has a market cap of $8.5 billion and is part of the utilities industry. Shares are up 6.6% year to date as of the close of trading on Tuesday. Currently there are 9 analysts that rate Calpine a buy, no analysts rate it a sell, and 4 rate it a hold. TheStreet Ratings rates Calpine as a sell. The company's weaknesses can be seen in multiple areas, such as its generally high debt management risk and poor profit margins. Get the full Calpine 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.