NEW YORK ( TheStreet) -- Shares of Dynavax Technologies Corporation (Nasdaq: DVAX) were gapping down Wednesday morning with an open price 18.5% lower than Tuesday's closing price. The stock closed at $5.09 Tuesday and opened today's trading at $4.15.

The average volume for Dynavax has been 1.6 million shares per day over the past 30 days. Dynavax has a market cap of $750.5 million and is part of the health care sector and drugs industry. Shares are up 53.3% year to date as of the close of trading on Tuesday.

Dynavax Technologies Corporation, a clinical-stage biopharmaceutical company, discovers and develops novel products to prevent and treat infectious diseases.

TheStreet Ratings rates Dynavax as a sell. The area that we feel has been the company's primary weakness has been its disappointing return on equity. You can view the full Dynavax Ratings Report.

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