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

MaxLinea (NYSE:MXL) is on the decline this week, earning a D (“sell”) after receiving a C (“hold”) last week. MaxLinear provides integrated, radio-frequency analog and mixed-signal semiconductor solutions for broadband communications applications. In Portfolio Grader’s specific subcategory of Equity, MXL also gets an F. For more information, get Portfolio Grader’s complete analysis of MXL stock.

This week, Kulicke & Soffa (NASDAQ:KLIC) drops from C to a D rating. Kulicke & Soffa designs, manufactures, and markets capital equipment, related spare parts, and packaging materials used to assemble semiconductor devices. The stock also gets an F in Earnings Revisions. For a full analysis of KLIC stock, visit Portfolio Grader.

This is a rough week for NeoPhotonics Corp. (NYSE:NPTN). The company’s rating falls to D from the previous week’s C. NeoPhotonics designs, manufacturers, and markets standard and semi custom planar light wave circuits for metro access and other advanced optical communications platforms. The stock gets F’s in Earnings Revisions, Equity, Cash Flow, and Margin Growth. The stock price has dropped 10.2% over the past month, worse than the 2.3% increase the S&P 500 has seen over the same period of time. To get an in-depth look at NPTN, get Portfolio Grader’s complete analysis of NPTN stock.

Slipping from C to a D rating, ASM (NASDAQ:ASMI) takes a hit this week. 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 gets F’s in Earnings Growth, Earnings Momentum, and Earnings Revisions. Earnings Surprise and Margin Growth also get F’s. The stock currently has a trailing PE Ratio of 41.20. For a full analysis of ASMI stock, visit Portfolio Grader.

Skyworks Solution (NASDAQ:SWKS) earns a D this week, falling from last week’s grade of C. Skyworks Solutions is an innovator of analog and mixed-signal semiconductors. Wall Street appears to agree with the stock downgrade, with share prices dropping 11.4% over the past month. For more information, get Portfolio Grader’s complete analysis of SWKS stock.

This week, RF Micro Devices’ (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. Investors seem to agree with the downgrade and have pushed down the share price 12.9% over the past month. To get an in-depth look at RFMD, get Portfolio Grader’s complete analysis of RFMD stock.

Silicon Laboratorie (NASDAQ:SLAB) is having a tough week. The company’s rating falls from C to a D. 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 rates an F in Earnings Momentum. The trailing PE Ratio for the stock is 28.50. For a full analysis of SLAB 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.