NEW YORK ( TheStreet) -- Shares of Alere (NYSE: ALR) were gapping down Friday morning with an open price 13.6% lower than Thursday's closing price. The stock closed at $22.30 Thursday and opened today's trading at $19.26. The average volume for Alere has been 661,800 shares per day over the past 30 days. Alere has a market cap of $1.78 billion and is part of the health care sector and health services industry. Shares are down 4.3% year to date as of the close of trading on Thursday. Alere Inc. develops and manufactures patient diagnosis, monitoring, and health management products and services for cardiology, infectious diseases, toxicology, diabetes, oncology, and women's health in the United States and internationally. TheStreet Ratings rates Alere as a hold. The company's strengths can be seen in multiple areas, such as its revenue growth, impressive record of earnings per share growth and compelling growth in net income. However, as a counter to these strengths, we also find weaknesses including a generally disappointing performance in the stock itself and generally poor debt management. You can view the full Alere Ratings Report. Get more investment ideas from our investment research center.