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 down 3 points (0.0%) at 14,544 as of Monday, April 22, 2013, 12:50 PM ET. The NYSE advances/declines ratio sits at 1,423 issues advancing vs. 1,490 declining with 125 unchanged. The Services sector currently sits down 0.21 versus the S&P 500, which is up 0.3%. On the negative front, top decliners within the sector include Grupo Aeroportuario del Sureste S.A.B. de ( ASR), down 6.08, Gap ( GPS), down 1.78, Genuine Parts Company ( GPC), down 1.49, Tyco International ( TYC), down 1.12 and McDonald's Corporation ( MCD), down 0.83. Top gainers within the sector include Delhaize Group ( DEG), up 11.1%, Netflix ( NFLX), up 5.6%, Six Flags Entertainment ( SIX), up 5.3%, Fleetcor Technologies ( FLT), up 2.1% and Companhia Brasileira De Distribuicao ( CBD), up 2.1%. TheStreet Ratings group would like to highlight 5 stocks pushing the sector lower today: 5. Southwest Airlines ( LUV) is one of the companies pushing the Services sector lower today. As of noon trading, Southwest Airlines is down $0.12 (-0.9%) to $13.22 on average volume Thus far, 4.0 million shares of Southwest Airlines exchanged hands as compared to its average daily volume of 7.4 million shares. The stock has ranged in price between $13.11-$13.48 after having opened the day at $13.46 as compared to the previous trading day's close of $13.34. Southwest Airlines Co. operates passenger airlines that provide scheduled air transportation services in the United States. As of December 31, 2012, the company operated 694 aircraft, including 606 Boeing 737 aircraft and 88 Boeing 717 aircraft. Southwest Airlines has a market cap of $9.4 billion and is part of the transportation industry. The company has a P/E ratio of 23.2, above the S&P 500 P/E ratio of 17.7. Shares are up 30.3% year to date as of the close of trading on Friday. TheStreet Ratings rates Southwest Airlines as a buy. The company's strengths can be seen in multiple areas, such as its solid stock price performance, revenue growth, attractive valuation levels, largely solid financial position with reasonable debt levels by most measures and notable return on equity. We feel these strengths outweigh the fact that the company shows low profit margins. Get the full Southwest Airlines Ratings Report now. Exclusive Offer: Jim Cramer's 'go-to' small/mid-cap guru Bryan Ashenberg only buys stocks he thinks could return 50-100%. See his top picks for 14-days FREE.