NEW YORK ( TheStreet) -- Shares of Alexza Pharmaceuticals (Nasdaq: ALXA) were gapping down Friday morning with an open price 34.4% lower than Thursday's closing price. The stock closed at 61 cents Thursday and opened today's trading at 40 cents. The average volume for Alexza has been 1.3 million shares per day over the past 30 days. Alexza has a market cap of $80.1 million and is part of the health care sector and drugs industry. Shares are down 16.9% year to date as of the close of trading on Thursday. Alexza Pharmaceuticals, Inc., a pharmaceutical company, engages in the research, development, and commercialization of novel proprietary products for the acute treatment of central nervous system conditions worldwide. TheStreet Ratings rates Alexza as a sell. The company's weaknesses can be seen in multiple areas, such as its deteriorating net income, generally disappointing historical performance in the stock itself and feeble growth in its earnings per share. You can view the full Alexza Ratings Report. Get more investment ideas from our investment research center.