NEW YORK ( TheStreet) -- Shares of Rubicon Technology (Nasdaq: RBCN) were gapping down Friday morning with an open price 13.7% lower than Thursday's closing price. The stock closed at $12.17 Thursday and opened today's trading at $10.50. The average volume for Rubicon Technology has been 469,200 shares per day over the past 30 days. Rubicon Technology has a market cap of $272.5 million and is part of the technology sector and electronics industry. Shares are up 31.8% year to date as of the close of trading on Thursday. Rubicon Technology, Inc. develops, manufactures, and sells monocrystalline sapphire and other crystalline products for light-emitting diodes (LED), radio frequency integrated circuits (RFICs), blue laser diodes, optoelectronics, and other optical applications. The company has a P/E ratio of 5.5, above the average electronics industry P/E ratio of 5.4 and below the S&P 500 P/E ratio of 17.7. 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 notable return on equity. However, as a counter to these strengths, we also find weaknesses including unimpressive growth in net income and a generally disappointing performance in the stock itself. You can view the full Rubicon Technology Ratings Report. Get more investment ideas from our investment research center. Interested in other stocks that are gapping down? Get free SMS text alerts sent to you when the action happens by texting DOWN to 95370 or select from multiple alert options.