Editor's Note: Any reference to TheStreet Ratings and its underlying recommendation does not reflect the opinion of TheStreet, Inc. or any of its contributors including Jim Cramer or Stephanie Link. One out of the three major indices are trading lower today with the Dow Jones Industrial Average ( ^DJI) trading up 61 points (0.4%) at 15,361 as of Friday, Sept. 13, 2013, 12:50 PM ET. The NYSE advances/declines ratio sits at 1,640 issues advancing vs. 1,247 declining with 140 unchanged. The Materials & Construction industry currently is unchanged today versus the S&P 500, which is up 0.2%. On the negative front, top decliners within the industry include Lennar Corporation ( LEN), down 3.0%, Meritage Homes Corporation ( MTH), down 2.3%, DR Horton ( DHI), down 2.4%, Foster Wheeler ( FWLT), down 1.6% and PulteGroup ( PHM), down 1.3%. TheStreet would like to highlight 5 stocks pushing the industry lower today: 5. Martin Marietta Materials ( MLM) is one of the companies pushing the Materials & Construction industry lower today. As of noon trading, Martin Marietta Materials is down $1.14 (-1.1%) to $98.78 on average volume. Thus far, 144,606 shares of Martin Marietta Materials exchanged hands as compared to its average daily volume of 348,400 shares. The stock has ranged in price between $97.64-$99.67 after having opened the day at $99.66 as compared to the previous trading day's close of $99.92. Martin Marietta Materials, Inc., together with its subsidiaries, engages in the production and sale of aggregates for the construction industry primarily in the United States, Canada, the Bahamas, and the Caribbean Islands. Martin Marietta Materials has a market cap of $4.6 billion and is part of the industrial goods sector. Shares are up 5.9% year to date as of the close of trading on Thursday. Currently there are 3 analysts that rate Martin Marietta Materials a buy, no analysts rate it a sell, and 6 rate it a hold. TheStreet Ratings rates Martin Marietta Materials as a buy. The company's strengths can be seen in multiple areas, such as its revenue growth, growth in earnings per share, increase in net income, 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 is trading at a premium valuation based on our review of its current price compared to such things as earnings and book value. Get the full Martin Marietta Materials 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.