The overall ratings of 10 Internet Software & Services stocks are down on Portfolio Grader this week. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Slipping from a C to a D rating, Autohome, Inc. Sponsored ADR Class A (ATHM) takes a hit this week. For more information, get Portfolio Grader’s complete analysis of ATHM stock.

This is a rough week for GTT Communications, Inc. (GTT). The company’s rating falls to D from the previous week’s C. The company also gets F’s in earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of GTT stock.

This week, Issuer Direct Corporation’s (ISDR) rating worsens to a D from the company’s B rating a week ago. For more information, get Portfolio Grader’s complete analysis of ISDR stock.

IZEA, Inc. (IZEA) gets weaker ratings this week as last week’s C drops to a D. The company also gets F’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of IZEA stock.

Xunlei Ltd. ADR (XNET) is having a tough week. The company’s rating falls from a D to a F. 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.

Great Elm Capital Group, Inc. (GEC) experiences a ratings drop this week, going from last week’s D to a F. The company also gets F’s in free cash flow. For more information, get Portfolio Grader’s complete analysis of GEC stock.

Renren Inc. Sponsored ADR Class A (RENN) declines this week from a D to a F. Renren Inc. Sponsored ADR Class A operates a real-time social networking website. The company also gets F’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of RENN stock.

Determine, Inc. (DTRM) slips from a D to a F this week. The company also gets F’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of DTRM stock.

This week, Spark Networks, Inc. (LOV) drops from a D to a F rating. Spark Networks, Inc. is a provider of online personals services in the United States and internationally. The company also gets F’s in sales growth, operating margin growth, earnings revisions, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of LOV stock.

Tremor Video, Inc.’s (TRMR) rating weakens this week, dropping to a F versus last week’s D. The company also gets F’s in sales growth, earnings revisions, earnings surprise, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of TRMR 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.