NEW YORK ( TheStreet) -- Changyou.com (Nasdaq: CYOU) is trading at unusually high volume Monday with 1.2 million shares changing hands. It is currently at four times its average daily volume and trading down $3.15 (-10.8%) at $25.94 as of 1 p.m. ET. Changyou.com has a market cap of $1.24 billion and is part of the technology sector and computer software & services industry. Shares are up 19.9% year to date as of the close of trading on Friday. Changyou.com Limited develops and operates online games in the People's Republic of China. The company has a P/E ratio of 7.1, above the average computer software & services industry P/E ratio of six and below the S&P 500 P/E ratio of 17.7. TheStreet Ratings rates Changyou.com as a sell. Among the areas we feel are negative, one of the most important has been a generally disappointing historical performance in the stock itself. You can view the full Changyou.com 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.