The ratings of three insurance stocks are down this week, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This week, The Progressive Corporation (PGR) falls to a D (“sell”), worse than last week’s grade of C (“hold”). Progressive is an insurance holding company that offers primarily personal and commercial automobile insurance, in addition to other property-casualty insurance products. At $25.93, the stock is under the 50-day moving average of $26.84. For a full analysis of PGR stock, visit Portfolio Grader.

The rating of The Chubb Corporation (CB) declines this week from a C to a D. Chubb provides property and casualty insurance to businesses and individuals around the world. At $89.27, the stock is below the 50-day moving average of $93.72. To get an in-depth look at CB, get Portfolio Grader’s complete analysis of CB stock.

XL Group Plc (XL) earns an F (“strong sell”) this week, moving down from last week’s grade of D (“sell”). XL provides property, casualty and specialty products to industrial, commercial and professional firms worldwide. The stock also gets an F in Earnings Momentum. At $30.22, the stock is under the 50-day moving average of $30.82. For more information, get Portfolio Grader’s complete analysis of XL 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.