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

Brooks Automation, Inc. (BRKS) experiences a ratings drop this week, going from last week’s C to a D. Brooks Automation, Inc. provides automation, vacuum, and instrumentation solutions to original equipment manufacturers and users throughout the world. The company also gets F’s in earnings revisions. For more information, get Portfolio Grader’s complete analysis of BRKS stock.

DSP Group, Inc. (DSPG) declines this week from a C to a D. DSP Group, Inc. provides wireless chipset solutions for converged communications at home. The company also gets F’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of DSPG stock.

Xcerra Corporation (XCRA) is having a tough week. The company’s rating falls from a D to a F. The company also gets F’s in sales growth, earnings growth, earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of XCRA stock.

Ultra Clean Holdings, Inc.’s (UCTT) rating weakens this week, dropping to a F versus last week’s D. Ultra Clean Holdings, Inc. is a developer and supplier of critical subsystems, mainly for the semiconductor capital equipment industry. The company also gets F’s in earnings revisions and earnings surprise. For more information, get Portfolio Grader’s complete analysis of UCTT 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.