This week, the overall grades of 4 Machinery stocks are lower, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Snap-on Incorporated (SNA) slips from a C to a D this week. Snap-on Incorporated conceives, manufactures, and markets of tools, diagnostics, equipment, software, and service solutions for professional clients. For more information, get Portfolio Grader’s complete analysis of SNA stock.

FreightCar America, Inc. (RAIL) gets weaker ratings this week as last week’s C drops to a D. FreightCar America, Inc. designs and manufactures aluminum and steel bodied railroad freight cars. The company also gets F’s in earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of RAIL stock.

This is a rough week for Navistar International Corporation (NAV). The company’s rating falls to D from the previous week’s C. Navistar International Corporation manufactures and markets medium and heavy trucks, school buses, mid-range diesel engines, and service parts. 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 NAV stock.

Jason Industries, Inc. (JASN) declines this week from a D to a F. The company also gets F’s in earnings revisions, earnings surprise, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of JASN 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.