NEW YORK ( TheStreet) -- Dun & Bradstreet Corporation (NYSE: DNB) is trading at unusually high volume Tuesday with 1.6 million shares changing hands. It is currently at four times its average daily volume and trading down $11.04 (-14.6%) at $64.66 as of 12:30 p.m. ET. Dun & Bradstreet has a market cap of $3.66 billion and is part of the technology sector and computer software & services industry. Shares are up 2.1% year to date as of the close of trading on Monday. The Dun & Bradstreet Corporation provides commercial information and insight on businesses worldwide. The company has a P/E ratio of 14.5, equal to the average computer software & services industry P/E ratio and below the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Dun & Bradstreet as a hold. The company's strengths can be seen in multiple areas, such as its revenue growth, growth in earnings per share and expanding profit margins. However, as a counter to these strengths, we find that the stock has had a generally disappointing performance in the past year. You can view the full Dun & Bradstreet Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.