NEW YORK ( TheStreet) -- Opentable (Nasdaq: OPEN) is trading at unusually high volume Wednesday with five million shares changing hands. It is currently at 4.1 times its average daily volume and trading down $4.81 (-9.3%) at $46.64 as of 12:25 p.m. ET. Opentable has a market cap of $1.11 billion and is part of the services sector and diversified services industry. Shares are up 31.5% year to date as of the close of trading on Tuesday. 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 62.7, above the average diversified services industry P/E ratio of 57.4 and above the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Opentable as a sell. The company's weaknesses can be seen in multiple areas, such as its generally disappointing historical performance in the stock itself and 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.