Three machinery stocks are moving up in their overall rating this week, according to the Portfolio Grader database. Every one of these is graded an “A” (“strong buy”) or “B” overall (“buy”).

This week, Luxfer Holdings PLC Sponsored ADR (LXFR) is showing good progress as the company’s rating jumps from a B (“buy”) last week to an A (“strong buy”). Luxfer Holdings, a materials technology company, engages in the design, manufacture, and supply of materials, components, and gas cylinders. In Portfolio Grader’s specific subcategory of Equity, LXFR also gets an A. For more information, get Portfolio Grader’s complete analysis of LXFR stock.

WABCO Holdings (WBC) is making progress this week as its rating of C (“hold”) from last week increases to a B (“buy”) rating this week. Wabco Holdings manufactures and sells control systems, including advanced braking, stability, suspension, transmission control and air compressing and processing systems, that improve vehicle performance and safety and reduce overall vehicle operating costs. Despite the upgrade, the stock has remained flat from a week ago. For more information, get Portfolio Grader’s complete analysis of WBC stock.

American Railcar Industries, Inc. (ARII) improves from a C to a B rating this week. American Railcar Industries designs, manufactures, and sells hopper and tank railcars in North America. For more information, get Portfolio Grader’s complete analysis of ARII 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.