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

Allison Transmission Holdings, Inc. (NYSE:ALSN) is on the decline this week, earning a D (“sell”) after receiving a C (“hold”) last week. Allison Transmission engages in the design and manufacture of commercial and military fully-automatic transmissions and hybrid-propulsion systems for transit buses. In Portfolio Grader’s specific subcategories of Earnings Momentum and Margin Growth, ALSN also gets F’s. The stock currently has a trailing PE Ratio of 54.40. For a full analysis of ALSN stock, visit Portfolio Grader.

The rating of China Automotive Systems, Inc. (NASDAQ:CAAS) declines this week from a C to a D. China Automotive System designs, markets, and sells custom-designed stained glass and leaded glass artifacts. The stock also gets an F in Margin Growth. To get an in-depth look at CAAS, get Portfolio Grader’s complete analysis of CAAS stock.

The rating of China XD Plastics Co., Ltd. (NASDAQ:CXDC) slips from a C to a D. China XD Plastics engages in the development, manufacture, and distribution of modified plastics primarily for use in the fabrication of automobile parts and components. For a full analysis of CXDC 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.