NEW YORK ( TheStreet) -- Shares of Neoprobe Corporation (AMEX: NEOP) were gapping up Thursday morning with an open price 17.9% higher than Wednesday's closing price. The stock closed at $2.63 Wednesday and opened today's trading at $3.10. The average volume for Neoprobe has been 755,900 shares per day over the past 30 days. Neoprobe has a market cap of $256.6 million and is part of the health care sector and health services industry. Shares are up 31.6% year to date as of the close of trading on Wednesday. Neoprobe Corporation, a biomedical company, engages in the development and commercialization of precision diagnostics that enhance patient care and improve patient benefit. The company is developing and commercializing targeted agents aimed at the identification of occult (undetected) disease. TheStreet Ratings rates Neoprobe as a hold. The company's strengths can be seen in multiple areas, such as its revenue growth, largely solid financial position with reasonable debt levels by most measures and solid stock price performance. However, as a counter to these strengths, we find that the company's return on equity has been disappointing. You can view the full Neoprobe Ratings Report. Get more investment ideas from our investment research center. Interested in other stocks that are gapping up? Get free SMS text alerts sent to you when the action happens by texting UP to 95370 or select from multiple alert options.