NEW YORK ( TheStreet) -- Shares of Stamps.com (Nasdaq: STMP) were gapping up Thursday morning with an open price 12.2% higher than Wednesday's closing price. The stock closed at $28.30 Wednesday and opened today's trading at $31.74. The average volume for Stamps.com has been 381,500 shares per day over the past 30 days. Stamps.com has a market cap of $451.9 million and is part of the services sector and retail industry. Shares are up 8.3% year to date as of the close of trading on Wednesday. Stamps.com Inc. provides Internet-based postage solutions. The company offers solutions to mail and ship various mail pieces, including postcards, envelopes, flats, and packages. The company has a P/E ratio of 16, equal to the average retail industry P/E ratio and below the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Stamps.com as a buy. The company's strengths can be seen in multiple areas, such as its compelling growth in net income, robust revenue growth, largely solid financial position with reasonable debt levels by most measures, notable return on equity and attractive valuation levels. Although no company is perfect, currently we do not see any significant weaknesses which are likely to detract from the generally positive outlook. You can view the full Stamps.com Ratings Report. Get more investment ideas from our investment research center.