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 Two out of the three major indices are trading up today with the Dow Jones Industrial Average ( ^DJI) trading up 14 points (0.1%) at 15,368 as of Monday, May 20, 2013, 12:50 PM ET. The NYSE advances/declines ratio sits at 1,885 issues advancing vs. 1,048 declining with 118 unchanged. The Services sector currently sits up 0.6% versus the S&P 500, which is up 0.1%. On the negative front, top decliners within the sector include Team ( TISI), down 17.14, Alaska Air Group ( ALK), down 4.57, Safeway ( SWY), down 2.43, Bed Bath & Beyond ( BBBY), down 2.16 and CarMax ( KMX), down 1.89. Top gainers within the sector include Websense ( WBSN), up 28.6%, Liberty Media Corporation ( LMCA), up 14.4%, Rite Aid Corporation ( RAD), up 7.5%, Ctrip.com International ( CTRP), up 5.0% and Ryanair Holdings ( RYAAY), up 4.7%. TheStreet Ratings group would like to highlight 5 stocks pushing the sector lower today: 5. United Continental Holdings ( UAL) is one of the companies pushing the Services sector lower today. As of noon trading, United Continental Holdings is down $0.40 (-1.1%) to $34.35 on light volume Thus far, 1.2 million shares of United Continental Holdings exchanged hands as compared to its average daily volume of 4.5 million shares. The stock has ranged in price between $34.22-$35.27 after having opened the day at $34.87 as compared to the previous trading day's close of $34.75. United Continental Holdings, Inc., through its subsidiaries, provides passenger and cargo air transportation services. The company operates in six continents from its hubs in Chicago, Cleveland, Denver, Guam, Houston, Los Angeles, New York/Newark, San Francisco, Tokyo, and Washington, D.C. United Continental Holdings has a market cap of $11.5 billion and is part of the transportation industry. Shares are up 48.6% year to date as of the close of trading on Friday. TheStreet Ratings rates United Continental Holdings as a hold. The company's strengths can be seen in multiple areas, such as its solid stock price performance, increase in net income and revenue growth. However, as a counter to these strengths, we also find weaknesses including generally higher debt management risk, disappointing return on equity and poor profit margins. Get the full United Continental Holdings 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.