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 down today with the Dow Jones Industrial Average ( ^DJI) trading down 65 points (-0.4%) at 15,111 as of Friday, June 14, 2013, 12:45 PM ET. The NYSE advances/declines ratio sits at 2,604 issues advancing vs. 474 declining with 57 unchanged. The Materials & Construction industry currently sits down 0.13 versus the S&P 500, which is down 0.25. On the negative front, top decliners within the industry include Plum Creek Timber ( PCL), down 0.71, and Masco Corporation ( MAS), down 0.38. Top gainers within the industry include MasTec ( MTZ), up 2.4%, Ryland Group ( RYL), up 2.1%, Standard Pacific ( SPF), up 1.7%, Lennar Corporation ( LEN), up 1.7% and NVR ( NVR), up 0.8%. TheStreet Ratings group would like to highlight 3 stocks pushing the industry lower today: 3. Gafisa ( GFA) is one of the companies pushing the Materials & Construction industry lower today. As of noon trading, Gafisa is down $0.20 (-6.1%) to $3.09 on light volume Thus far, 387,666 shares of Gafisa exchanged hands as compared to its average daily volume of 1.9 million shares. The stock has ranged in price between $3.09-$3.26 after having opened the day at $3.25 as compared to the previous trading day's close of $3.29. Gafisa S.A. operates as a homebuilder in Brazil. The company operates in three segments: Gafisa, Tenda, and Alphaville. Gafisa has a market cap of $651.8 million and is part of the industrial goods sector. Shares are down 29.2% year to date as of the close of trading on Thursday. Currently there is 1 analyst that rates Gafisa a buy, 1 analyst rates it a sell, and none rate it a hold. TheStreet Ratings rates Gafisa as a sell. The company's weaknesses can be seen in multiple areas, such as its unimpressive growth in net income, weak operating cash flow and poor profit margins. Get the full Gafisa 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.