This week, the ratings of 7 Internet Software & Services stocks on Portfolio Grader are down. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This week, Sohu.com, Inc.’s (SOHU) rating worsens to a F from the company’s D rating a week ago. Sohu.com, Inc. is an Internet media company that serves as a daily source of information, communication and entertainment for millions of Chinese consumers. The company also gets F’s in earnings revisions and earnings momentum. For more information, get Portfolio Grader’s complete analysis of SOHU stock.

Slipping from a D to a F rating, 21Vianet Group, Inc. Sponsored ADR Class A (VNET) takes a hit this week. 21Vianet Group, Inc. Sponsored ADR Class A provides carrier-neutral Internet data center services in the People’’s Republic of China. The company also gets F’s in earnings revisions. For more information, get Portfolio Grader’s complete analysis of VNET stock.

Numerex Corp. Class A (NMRX) declines this week from a C to a D. Numerex Corp. Class A develops and markets a variety of communication and information products and services. The company also gets F’s in sales growth, operating margin growth, earnings revisions, and return on equity. For more information, get Portfolio Grader’s complete analysis of NMRX stock.

This is a rough week for Xunlei Ltd. ADR (XNET). The company’s rating falls to F from the previous week’s D. The company also gets F’s in operating margin growth and earnings growth. For more information, get Portfolio Grader’s complete analysis of XNET stock.

This week, SouFun Holdings Ltd. Sponsored ADR Class A (SFUN) drops from a D to a F rating. SouFun Holdings Ltd. Sponsored ADR Class A operates a real estate Internet portal, and a home furnishing and improvement website in the People’’s Republic of China. The company also gets F’s in operating margin growth, earnings growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of SFUN stock.

Leju Holdings Ltd. Sponsored ADR (LEJU) is having a tough week. The company’s rating falls from a D to a F. The company also gets F’s in earnings revisions. For more information, get Portfolio Grader’s complete analysis of LEJU stock.

CYREN Ltd. (CYRN) earns a D this week, moving down from last week’s grade of C. The company also gets F’s in earnings revisions and return on equity. For more information, get Portfolio Grader’s complete analysis of CYRN 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.