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 All three major indices are trading up today with the Dow Jones Industrial Average ( ^DJI) trading up 12 points (0.1%) at 15,069 as of Wednesday, May 8, 2013, 12:55 PM ET. The NYSE advances/declines ratio sits at 1,670 issues advancing vs. 1,254 declining with 121 unchanged. The Diversified Services industry currently sits up 0.1% versus the S&P 500, which is up 0.2%. On the negative front, top decliners within the industry include Mercadolibre ( MELI), down 4.71, Moody's Corporation ( MCO), down 1.31 and H&R Block ( HRB), down 1.00. TheStreet Ratings group would like to highlight 3 stocks pushing the industry lower today: 3. Zillow ( Z) is one of the companies pushing the Diversified Services industry lower today. As of noon trading, Zillow is down $6.25 (-9.9%) to $56.69 on heavy volume Thus far, 1.8 million shares of Zillow exchanged hands as compared to its average daily volume of 750,800 shares. The stock has ranged in price between $56.30-$60.35 after having opened the day at $59.87 as compared to the previous trading day's close of $62.94. Zillow, Inc. engages in the operation of a real estate and home-related information marketplace on mobile and the Web in the United States. Zillow has a market cap of $1.7 billion and is part of the services sector. The company has a P/E ratio of 338.9, above the S&P 500 P/E ratio of 17.7. Shares are up 126.8% year to date as of the close of trading on Tuesday. TheStreet Ratings rates Zillow as a hold. The company's strengths can be seen in multiple areas, such as its robust revenue growth, largely solid financial position with reasonable debt levels by most measures and good cash flow from operations. However, as a counter to these strengths, we also find weaknesses including unimpressive growth in net income and premium valuation. Get the full Zillow 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.