NEW YORK ( TheStreet) -- Shares of Ista Pharmaceuticals (Nasdaq: ISTA) were gapping down Friday morning with an open price 13.3% lower than Thursday's closing price. The stock closed at $7.20 Thursday and opened today's trading at $6.24. The average volume for Ista has been 650,000 shares per day over the past 30 days. Ista has a market cap of $240.3 million and is part of the health care sector and drugs industry. Shares are up 40.4% year to date as of the close of trading on Thursday. ISTA Pharmaceuticals, Inc., a pharmaceutical company, discovers, develops, and markets remedies for diseases and conditions of the eye in the United States. TheStreet Ratings rates Ista as a sell. Among the areas we feel are negative, one of the most important has been generally deteriorating net income. You can view the full Ista 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.