NEW YORK ( TheStreet) -- Shares of Blue Nile Inc (Nasdaq: NILE) were gapping down Friday morning with an open price 12.3% lower than Thursday's closing price. The stock closed at $63.66 Thursday and opened today's trading at $55.81. The average volume for Blue Nile has been 247,700 shares per day over the past 30 days. Blue Nile has a market cap of $868.6 million and is part of the services sector and retail industry.

Blue Nile, Inc. and its subsidiaries operate as an online retailer of diamonds and fine jewelry worldwide. The company has a P/E ratio of 68.6, above the average retail industry P/E ratio of 67.8 and above the S&P 500 P/E ratio of 23.5.

TheStreet Ratings rates Blue Nile as hold. The company's strengths can be seen in multiple areas, such as its 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 find that the company's profit margins have been poor overall. You can view the full Blue Nile Ratings Report.

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