NEW YORK ( TheStreet) -- Shares of Weight Watchers International (NYSE: WTW) were gapping up Thursday morning with an open price 31.7% higher than Wednesday's closing price. The stock closed at $44.92 Wednesday and opened today's trading at $59.17. The average volume for Weight Watchers International has been 305,300 shares per day over the past 30 days. Weight Watchers International has a market cap of $3.3 billion and is part of the services sector and diversified services industry. Weight Watchers International, Inc. provides weight management services worldwide. It offers various services and products that are built upon weight management plans comprising nutritional, exercise, and behavioral tools and approaches. The company has a P/E ratio of 20.7, equal to the average diversified services industry P/E ratio and below the S&P 500 P/E ratio of 23.3. TheStreet Ratings rates Weight Watchers International as a hold. The company's strengths can be seen in multiple areas, such as its revenue growth, solid stock price performance and good cash flow from operations. However, as a counter to these strengths, we also find weaknesses including deteriorating net income and feeble growth in the company's earnings per share. You can view the full Weight Watchers International Ratings Report. Get more investment ideas from our investment research center.