NEW YORK ( TheStreet) -- Shares of Heartware International (Nasdaq: HTWR) were gapping down Monday morning with an open price 18.8% lower than Friday's closing price. The stock closed at $83.91 Friday and opened today's trading at $68.11. The average volume for Heartware International has been 123,500 shares per day over the past 30 days. Heartware International has a market cap of $1.1 billion and is part of the health care sector and health services industry. Shares are down 4.2% year to date as of the close of trading on Friday. HeartWare International, Inc., a medical device company, engages in the design, manufacture, and marketing of medical devices for the treatment of advanced heart failure. TheStreet Ratings rates Heartware International as a sell. The company's weaknesses can be seen in multiple areas, such as its deteriorating net income, weak operating cash flow and feeble growth in its earnings per share. You can view the full Heartware International Ratings Report. Get more investment ideas from our investment research center. Interested in other stocks that are gapping down? Get free SMS text alerts sent to you when the action happens by texting DOWN to 95370 or select from multiple alert options.