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

Kulicke & Soffa Industries, Inc.’s (NASDAQ:KLIC) rating falls to a D (“sell”) this week, down from C (“hold”) the week prior. Kulicke & Soffa designs, manufactures, and markets capital equipment, related spare parts, and packaging materials used to assemble semiconductor devices. In Portfolio Grader’s specific subcategory of Earnings Revisions, KLIC also gets an F. The stock currently has a trailing PE Ratio of 33.10. To get an in-depth look at KLIC, get Portfolio Grader’s complete analysis of KLIC stock.

This week, NeoPhotonics Corporation’s (NYSE:NPTN) rating worsens to a D from the company’s C rating a week ago. NeoPhotonics designs, manufacturers, and markets standard and semi custom planar light wave circuits for metro access and other advanced optical communications platforms. The stock receives F’s in Earnings Revisions, Equity, Cash Flow, and Margin Growth. For a full analysis of NPTN stock, visit Portfolio Grader.

ASM International NV NY Registered Shs’ (NASDAQ:ASMI) rating weakens this week, dropping to a D versus last week’s C. ASM is a semiconductor capital equipment supplier engaged in the design, manufacture, and sale of production systems and services for the production of semiconductor devices or integrated circuits. The stock receives F’s in Earnings Growth, Earnings Momentum, and Earnings Revisions. Earnings Surprise and Margin Growth also get F’s. For more information, get Portfolio Grader’s complete analysis of ASMI stock.

The rating of Skyworks Solutions, Inc. (NASDAQ:SWKS) declines this week from a C to a D. Skyworks Solutions is an innovator of analog and mixed-signal semiconductors. The trailing PE Ratio for the stock is 25.30. To get an in-depth look at SWKS, get Portfolio Grader’s complete analysis of SWKS stock.

This week, RF Micro Devices, Inc.’s (NASDAQ:RFMD) rating worsens to a D from the company’s C rating a week ago. RF Micro Devices designs, develops, and markets proprietary radio frequency integrated circuits. The stock gets F’s in Equity and Margin Growth. For more information, get Portfolio Grader’s complete analysis of RFMD stock.

This week, Silicon Laboratorie (NASDAQ:SLAB) drops from a C to a D rating. Silicon Laboratories designs and develops proprietary, analog-intensive and mixed-signal integrated circuits that can be used in a range of applications. The stock also gets an F in Earnings Momentum. The stock currently has a trailing PE Ratio of 35.80. To get an in-depth look at SLAB, get Portfolio Grader’s complete analysis of SLAB stock.

MaxLinear, Inc. Class A (NYSE:MXL) gets weaker ratings this week as last week’s C drops to a D. MaxLinear provides integrated, radio-frequency analog and mixed-signal semiconductor solutions for broadband communications applications. The stock also rates an F in Equity. For a full analysis of MXL stock, visit Portfolio Grader.

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.