NEW YORK ( TheStreet) -- Endologix (Nasdaq: ELGX) is trading at unusually high volume Thursday with 1.8 million shares changing hands. It is currently at five times its average daily volume and trading down 51 cents (-3.6%) at $13.59 as of 4 p.m. ET. Endologix has a market cap of $816.5 million and is part of the health care sector and health services industry. Shares are up 22.8% year to date as of the close of trading on Wednesday. Endologix, Inc. develops, manufactures, markets, and sells medical devices for the treatment of aortic disorders. It offers the ELG System, a stent graft and delivery system for the treatment of abdominal aortic aneurysms through minimally-invasive endovascular repair. TheStreet Ratings rates Endologix as a sell. The company's weaknesses can be seen in multiple areas, such as its deteriorating net income, disappointing return on equity and feeble growth in its earnings per share. You can view the full Endologix Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center.