NEW YORK ( TheStreet) -- Shares of AVI BioPharma (Nasdaq: AVII) were gapping down Friday morning with an open price 16.2% lower than Thursday's closing price. The stock closed at $1.05 Thursday and opened today's trading at 88 cents. The average volume for AVI BioPharma has been 1.2 million shares per day over the past 30 days. AVI BioPharma has a market cap of $147.9 million and is part of the health care sector and drugs industry. Shares are down 50.5% year to date as of the close of trading on Thursday. AVI BioPharma, Inc., a biopharmaceutical company, focuses on the discovery and development of RNA-based therapeutics for the treatment of rare and infectious diseases. TheStreet Ratings rates AVI BioPharma as a sell. Among the areas we feel are negative, one of the most important has been a generally disappointing historical performance in the stock itself. You can view the full AVI BioPharma 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.