This week, the overall grades of 5 Internet Software & Services stocks are lower, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Criteo SA Sponsored ADR (CRTO) gets weaker ratings this week as last week’s C drops to a D. The company also gets F’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of CRTO stock.

Marketo, Inc. (MKTO) is having a tough week. The company’s rating falls from a C to a D. The company also gets F’s in earnings surprise and return on equity. For more information, get Portfolio Grader’s complete analysis of MKTO stock.

This is a rough week for Zillow Group, Inc. Class A (ZG). The company’s rating falls to D from the previous week’s C. For more information, get Portfolio Grader’s complete analysis of ZG stock.

Hortonworks, Inc.’s (HDP) rating weakens this week, dropping to a D versus last week’s C. The company also gets F’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of HDP stock.

Bazaarvoice, Inc. (BV) declines this week from a D to a F. Bazaarvoice, Inc. provides social commerce solutions which enable its clients to capture, display and analyze online word of mouth. The company also gets F’s in return on equity. For more information, get Portfolio Grader’s complete analysis of BV 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.