For the current week, the overall ratings of eight Internet and Web Service stocks are worse, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This week, SouFun Holding (NYSE:SFUN) falls to a D (“sell”), worse than last week’s grade of C (“hold”). SouFun Holdings operates real estate and home furnishing and improvement Internet websites. For Portfolio Grader’s specific subcategory of Earnings Momentum, SFUN also gets an F. The stock price has fallen 17.2% over the past month, worse than the 2.7% increase the S&P 500 has seen over the same period of time. For a full analysis of SFUN stock, visit Portfolio Grader.

Dice Holdings‘s (NYSE:DHX) rating weakens this week, dropping to a D versus last week’s C. Dice Holdings provides specialized career Websites and career fairs for professional communities. Wall Street appears to agree with the stock downgrade, with share prices dropping 18% over the past month. Shares of the stock have been changing hands at an unusually rapid pace, up 544.3% from the week prior. To get an in-depth look at DHX, get Portfolio Grader’s complete analysis of DHX stock.

The rating of LogMeIn Inc. (NASDAQ:LOGM) declines this week from a C to a D. LogMeIn offers remote connectivity services to computers for mobile professionals, and help desk and systems administrators worldwide. The stock gets F’s in Earnings Growth and Margin Growth. The stock price has fallen 36.2% over the past month. As of August 3, 13.5% of outstanding LogMeIn Inc. shares were held short. The stock currently has a trailing PE Ratio of 136.5. For more information, get Portfolio Grader’s complete analysis of LOGM stock.

EarthLink (NASDAQ:ELNK) is having a tough week. The company’s rating falls from a C to a D rating. EarthLink is a provider of a suite of communications services to individual and business customers in the United States. The stock gets F’s in Earnings Growth and Margin Growth. Share prices fell 15.2% over the past month. Shares of the stock are being traded at a very rapid pace, up 387.1% from the week prior. The trailing PE Ratio for the stock is 28.3. To get an in-depth look at ELNK, get Portfolio Grader’s complete analysis of ELNK stock.

Sohu.com (NASDAQ:SOHU) ratings are on the decline this week as the company earns an F (“strong sell”). Last week, it received a D (“sell”). Sohu.com is an Internet media company that serves as a daily source of information, communication and entertainment for millions of Chinese consumers. The stock also rates an F in Earnings Revisions. Investors seem to agree with the downgrade and have pushed down the share price 19.8% over the past month. As of August 3, 12.3% of outstanding Sohu.com shares were held short. For more information, get Portfolio Grader’s complete analysis of SOHU stock.

This is a rough week for QuinStreet (NASDAQ:QNST). The company’s rating falls to D from the previous week’s C. QuinStreet specializes in vertical marketing and media on the Internet. The stock gets F’s in Earnings Growth and Sales Growth. Wall Street appears to agree with the stock downgrade, with share prices dropping 9.5% over the past month. For a full analysis of QNST stock, visit Portfolio Grader.

Active Network (NYSE:ACTV) earns a D this week, moving down from last week’s grade of C. Active Network provides organization-based cloud computing applications services to business customers in North America, Europe, and internationally. The stock also gets an F in Equity. The stock price has fallen 23.4% over the past month. Trade volume is up 855% from the previous week. To get an in-depth look at ACTV, get Portfolio Grader’s complete analysis of ACTV stock.

The rating of Renren Inc. (NYSE:RENN) slips from a D to an F. Renren operates real name social networking internet platform in China, the platform enables users to connect and communicate with each other, share information and user-generated content, play online games, listen to music, shop for deals and enjoy a wide range of other features and services. The stock also gets an F in Earnings Revisions. Share prices fell 14.5% over the past month. For more information, get Portfolio Grader’s complete analysis of RENN stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.