NEW YORK ( TheStreet) -- Shares of eResearchTechnology (Nasdaq: ERT) were gapping up Tuesday morning with an open price 20.3% higher than Monday's closing price. The stock closed at $5.56 Monday and opened today's trading at $6.69. The average volume for eResearchTechnology has been 201,100 shares per day over the past 30 days. eResearchTechnology has a market cap of $268.9 million and is part of the health care sector and health services industry. Shares are up 18.6% year to date as of the close of trading on Monday. eResearchTechnology, Inc., together with its subsidiaries, provides technological services and medical devices in North America and the United Kingdom. The company has a P/E ratio of 44.5, above the average health services industry P/E ratio of 20.2 and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates eResearchTechnology as a hold. The company's strengths can be seen in multiple areas, such as its compelling growth in net income, revenue growth and largely solid financial position with reasonable debt levels by most measures. However, as a counter to these strengths, we find that the stock has had a generally disappointing performance in the past year. You can view the full eResearchTechnology 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.