NEW YORK ( TheStreet) -- Harry Winston Diamond (NYSE: HWD) is trading at unusually high volume Tuesday with 1.1 million shares changing hands. It is currently at four times its average daily volume and trading down 83 cents (-5.3%) at $14.93 as of 3:55 p.m. ET. Harry Winston has a market cap of $972.3 million and is part of the basic materials sector and metals & mining industry. Shares are up 48% year to date as of the close of trading on Monday. Harry Winston Diamond Corporation, a diamond company, engages in mining and retailing diamonds in Canada and internationally. The company has a P/E ratio of 762.5, above the average metals & mining industry P/E ratio of 52.1 and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Harry Winston as a hold. The company's strengths can be seen in multiple areas, such as its expanding profit margins, notable return on equity and increase in stock price during the past year. However, as a counter to these strengths, we also find weaknesses including unimpressive growth in net income, weak operating cash flow and generally poor debt management. You can view the full Harry Winston Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center. Interested in other stocks that are falling on unusually high volume? Get free SMS text alerts sent to you when the action happens by texting HVDOWN to 95370 or select from multiple alert options.