This week, the ratings of 4 Internet Software & Services stocks on Portfolio Grader are down. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Akamai Technologies, Inc. (AKAM) is having a tough week. The company’s rating falls from a C to a D. Akamai Technologies, Inc. provides services for accelerating and improving the delivery of content and applications over the Internet. For more information, get Portfolio Grader’s complete analysis of AKAM stock.

Brightcove Inc.’s (BCOV) rating weakens this week, dropping to a D versus last week’s C. Brightcove Inc. is a global provider of cloud content services. The company also gets F’s in return on equity. For more information, get Portfolio Grader’s complete analysis of BCOV stock.

Perion Network Ltd (PERI) gets weaker ratings this week as last week’s C drops to a D. Perion Network Ltd is a digital media company that provides products and services to consumers. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of PERI stock.

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