NEW YORK ( TheStreet) -- Sun Communities (NYSE: SUI) is trading at unusually high volume Thursday with 634,705 shares changing hands. It is currently at 5.4 times its average daily volume and trading up 77 cents (+2.1%) at $37.17 as of 3:55 p.m. ET. Sun has a market cap of $813.9 million and is part of the financial sector and real estate industry. Shares are down 0.4% year to date as of the close of trading on Wednesday. Sun Communities, Inc. operates as a real estate investment trust (REIT). It owns, operates, and develops manufactured housing communities in the midwestern, southern, and southeastern United States. The company has a P/E ratio of 1205.3, above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Sun as a hold. The company's strengths can be seen in multiple areas, such as its largely solid financial position with reasonable debt levels by most measures, good cash flow from operations and impressive record of earnings per share growth. However, as a counter to these strengths, we find that the company's profit margins have been poor overall. You can view the full Sun 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 rising on unusually high volume? Get free SMS text alerts sent to you when the action happens by texting HVUP to 95370 or select from multiple alert options.