NEW YORK ( TheStreet) -- Shares of Rubicon Technology (Nasdaq: RBCN) were gapping up Thursday morning with an open price 18.4% higher than Wednesday's closing price. The stock closed at $21.11 Wednesday and opened today's trading at $25. The average volume for Rubicon Technology has been 615,200 shares per day over the past 30 days. Rubicon Technology has a market cap of $467.9 million and is part of the technology sector and electronics industry. Rubicon Technology, Inc. develops, manufactures, and sells monocrystalline sapphire and other crystalline products for light-emitting diodes, radio frequency integrated circuits, blue laser diodes, optoelectronics, and other optical applications. The company has a P/E ratio of 35.8, below the average electronics industry P/E ratio of 36.4 and above the S&P 500 P/E ratio of 23.3. TheStreet Ratings rates Rubicon Technology as a hold. The company's strengths can be seen in multiple areas, such as its robust revenue growth, largely solid financial position with reasonable debt levels by most measures and expanding profit margins. However, as a counter to these strengths, we find that the company's return on equity has been disappointing. You can view the full Rubicon Technology Ratings Report. Get more investment ideas from our investment research center.