NEW YORK ( TheStreet) -- Opentable (Nasdaq: OPEN) is trading at unusually high volume Thursday with five million shares changing hands. It is currently at four times its average daily volume and trading down $5.22 (-8.3%) at $57.51 as of 1:16 p.m. ET. Opentable has a market cap of $1.4 billion and is part of the services sector and diversified services industry. Shares are down 11% year to date as of the close of trading on Wednesday. OpenTable, Inc. provides restaurant reservation solutions in the United States, Canada, Mexico, Europe, and Asia. It offers solutions that form an online network connecting reservation-taking restaurants and people who dine at those restaurants. The company has a P/E ratio of 74.2, equal to the average diversified services industry P/E ratio and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Opentable as a hold. The company's strengths can be seen in multiple areas, such as its largely solid financial position with reasonable debt levels by most measures, robust revenue growth and impressive record of earnings per share growth. However, as a counter to these strengths, we find that the stock itself is trading at a premium valuation. You can view the full Opentable Ratings Report. See all heavy volume stocks in our stocks moving on unusual volume list or get investment ideas from our investment research center. Interested in other stocks that are falling on unusually high volume? Get free SMS text alerts sent to you when the action happens by texting HVDOWN to 95370 or select from multiple alert options.