The overall ratings of four Distributors stocks are down on Portfolio Grader this week. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Aircastle’s (NYSE:AYR) rating falls this week to an F (“strong sell”), down from last week’s D (“sell”). Aircastle is engaged in acquiring, leasing, and selling commercial jet aircrafts to passenger and cargo airlines throughout the world. In Portfolio Grader’s specific subcategories of Earnings Growth, Earnings Momentum, Earnings Revisions, Cash Flow, and Margin Growth, AYR also gets F’s. For a full analysis of AYR stock, visit Portfolio Grader.

Houston Wire & Cable (NASDAQ:HWCC) gets weaker ratings this week as last week’s D drops to an F. Houston Wire & Cable distributes specialty wire- and cable-related services to the electrical distribution market. The stock gets F’s in Earnings Surprise and Sales Growth. To get an in-depth look at HWCC, get Portfolio Grader’s complete analysis of HWCC stock.

MSC Industrial Direct (NYSE:MSM) is on the decline this week, earning a D (“sell”) after receiving a C (“hold”) last week. MSC Industrial Direct is a direct marketer and supplier of a broad range of metalworking and maintenance and repair supplies. For more information, get Portfolio Grader’s complete analysis of MSM stock.

The rating of W.W. Grainger (NYSE:GWW) slips from C to a D. W.W. Grainger is a distributor of facilities maintenance products and provides services and related information used by businesses and institutions throughout North America. For a full analysis of GWW 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.