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

CSX Corp. (NYSE:CSX) is on the decline this week, earning a D (“sell”) after receiving a C (“hold”) last week. CSX provides traditional rail service and the rail-based transport of intermodal containers and trailers. For a full analysis of CSX stock, visit Portfolio Grader.

This is a rough week for Werner Enterprises (NASDAQ:WERN). The company’s rating falls to D from the previous week’s C. Werner Enterprises is a transportation and logistics company, which is engaged mainly in hauling truckload shipments of general commodities in both interstate and intrastate commerce. The stock also rates an F in Cash Flow. To get an in-depth look at WERN, get Portfolio Grader’s complete analysis of WERN stock.

Swift Transportation (NYSE:SWFT) experiences a ratings drop this week, going from last week’s C to a D. Swift Transportation is a truckload carrier in North America. The stock also gets an F in Earnings Momentum. For more information, get Portfolio Grader’s complete analysis of SWFT stock.

Slipping from a C to a D rating, Knight Transportation (NYSE:KNX) takes a hit this week. Knight Transportation is a short-to-medium haul, dry van truckload carrier. For a full analysis of KNX 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.