NEW YORK ( TheStreet) -- Martin Marietta Materials (NYSE: MLM) is trading at unusually high volume Wednesday with 2.4 million shares changing hands. It is currently at 4.9 times its average daily volume and trading down $5.82 (-7.8%) at $68.90 as of 3:46 p.m. ET. Martin Marietta has a market cap of $3.47 billion and is part of the industrial goods sector and materials & construction industry. Shares are up 0.6% year to date as of the close of trading on Tuesday. 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. The company has a P/E ratio of 60.2, above the average materials & construction industry P/E ratio of 55.8 and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Martin Marietta as a hold. The company's strengths can be seen in multiple areas, such as its revenue growth and largely solid financial position with reasonable debt levels by most measures. However, as a counter to these strengths, we also find weaknesses including a generally disappointing performance in the stock itself, deteriorating net income and premium valuation. You can view the full Martin Marietta Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.