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 23 points (-0.2%) at 15,060 as of Friday, May 10, 2013, 12:49 PM ET. The NYSE advances/declines ratio sits at 1,550 issues advancing vs. 1,371 declining with 121 unchanged. The Services sector currently sits up 0.5% versus the S&P 500, which is unchanged. On the negative front, top decliners within the sector include L Brands ( LTD), down 1.88, Best Buy ( BBY), down 1.56, Western Union Company ( WU), down 1.09 and Carnival Corporation ( CCL), down 0.58. Top gainers within the sector include Liberty Media Corporation ( LMCA), up 10.4%, Advisory Board Company ( ABCO), up 9.8%, Gap ( GPS), up 5.1%, Expedia ( EXPE), up 3.9% and Sears Holdings Corporation ( SHLD), up 3.7%. TheStreet Ratings group would like to highlight 3 stocks pushing the sector lower today: 3. Air Lease ( AL) is one of the companies pushing the Services sector lower today. As of noon trading, Air Lease is down $1.17 (-3.8%) to $29.41 on heavy volume Thus far, 788,387 shares of Air Lease exchanged hands as compared to its average daily volume of 454,900 shares. The stock has ranged in price between $28.60-$29.90 after having opened the day at $28.90 as compared to the previous trading day's close of $30.58. Air Lease Corporation engages in the purchase and leasing of commercial aircraft to airlines worldwide. The company also provides fleet management and remarketing services. Air Lease has a market cap of $2.9 billion and is part of the diversified services industry. The company has a P/E ratio of 23.0, above the S&P 500 P/E ratio of 17.7. Shares are up 42.2% year to date as of the close of trading on Thursday. TheStreet Ratings rates Air Lease as a sell. Among the areas we feel are negative, one of the most important has been very high debt management risk by most measures. Get the full Air Lease 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.