The overall ratings of 5 Semiconductors & Semiconductor Equipment stocks are down on Portfolio Grader this week. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Micron Technology, Inc. (MU) slips from a C to a D this week. Micron Technology, Inc. manufactures and markets Dram and Nand Flash memory, image sensors and other semiconductor components. The company also gets F’s in sales growth, operating margin growth, and earnings growth. For more information, get Portfolio Grader’s complete analysis of MU stock.

This is a rough week for Hanwha Q CELLS Co., Ltd. Sponsored ADR (HQCL). The company’s rating falls to D from the previous week’s C. The company also gets F’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of HQCL stock.

Yingli Green Energy Holding Co. Ltd. Sponsored ADR (YGE) gets weaker ratings this week as last week’s C drops to a D. Yingli Green Energy Holding Co. Ltd. Sponsored ADR designs, manufactures and sells photovoltaic modules, and designs, assembles, sells and installs photovoltaic systems. The company also gets F’s in sales growth, earnings revisions, and free cash flow. For more information, get Portfolio Grader’s complete analysis of YGE stock.

United Microelectronics Corp. Sponsored ADR (UMC) earns a D this week, moving down from last week’s grade of C. United Microelectronics Corp. Sponsored ADR is a semiconductor wafer foundry that provides wafer fabrication services and technologies. The company also gets F’s in earnings revisions and free cash flow. For more information, get Portfolio Grader’s complete analysis of UMC stock.

ReneSola Ltd. Sponsored ADR’s (SOL) rating weakens this week, dropping to a D versus last week’s C. ReneSola Ltd. Sponsored ADR develops, manufactures and sells solar wafers, which are thin sheets of crystalline silicon material mainly made by slicing monocrystalline or multicrystalline ingots. The company also gets F’s in earnings revisions. For more information, get Portfolio Grader’s complete analysis of SOL 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.