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

Vitesse Semiconductor Corporation (NASDAQ:VTSS) is on the decline this week, earning a D (“sell”) after receiving a C (“hold”) last week. Vitesse develops integrated circuits for a variety of applications in storage and communications. In Portfolio Grader’s specific subcategories of Earnings Growth, Earnings Momentum, Equity, Cash Flow, and Sales Growth, VTSS also gets F’s. To get an in-depth look at VTSS, get Portfolio Grader’s complete analysis of VTSS stock.

Kulicke & Soffa Industries, Inc. (NASDAQ:KLIC) experiences a ratings drop this week, going from last week’s C to a D. 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 Corporation (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. To get an in-depth look at NPTN, get Portfolio Grader’s complete analysis of NPTN stock.

The rating of ASM International NV NY Registered Shs (NASDAQ:ASMI) slips from a C to a D. 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.

Skyworks Solutions, Inc. (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. To get an in-depth look at SWKS, get Portfolio Grader’s complete analysis of SWKS stock.

RF Micro Devices, Inc. (NASDAQ:RFMD) earns a D this week, moving down from last week’s grade of C. RF Micro Devices designs, develops, and markets proprietary radio frequency integrated circuits. The stock gets F’s in Equity and Margin Growth. The stock price has fallen 16.7% over the past month, worse than the 1.3% decrease the Nasdaq has seen over the same period of time. For a full analysis of RFMD stock, visit Portfolio Grader.

Silicon Laboratorie’s (NASDAQ:SLAB) rating weakens this week, dropping to a D versus last week’s C. 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’s trailing PE Ratio is 29.50. For more information, get Portfolio Grader’s complete analysis of SLAB stock.

The rating of MaxLinear, Inc. Class A (NYSE:MXL) declines this week from a C to a D. MaxLinear provides integrated, radio-frequency analog and mixed-signal semiconductor solutions for broadband communications applications. The stock also gets 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.