For the current week, the overall ratings of four insurance stocks are worse, according to the Portfolio Graderdatabase. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This week, Ambac Financial Group, Inc. (AMBC) falls to a D (“sell”), worse than last week’s grade of C (“hold”). In Portfolio Grader’s specific subcategories of Earnings Growth, Earnings Momentum, Margin Growth and Sales Growth, AMBC also gets F’s. To get an in-depth look at AMBC, get Portfolio Grader’s complete analysis of AMBC stock.

The rating of Independence Holding Company (IHC) declines this week from a C to a D. Independence Holding sells life and health insurance. The stock also rates an F in Sales Growth. For more information, get Portfolio Grader’s complete analysis of IHC stock.

United Fire Group, Inc. (UFCS) experiences a ratings drop this week, going from last week’s C to a D. United Fire engages in writing property, casualty, and life insurance products and selling fixed annuities in the United States. The stock also gets an F in Earnings Growth. To get an in-depth look at UFCS, get Portfolio Grader’s complete analysis of UFCS stock.

This week, Baldwin & Lyons, Inc. Class B (BWINB) drops from a C to a D rating. Baldwin & Lyons markets and underwrites property and casualty insurance. The stock also gets an F in Earnings Surprise. Shares of the stock have been trading at an exceptionally rapid pace, up fourfold from the week prior. For more information, get Portfolio Grader’s complete analysis of BWINB 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.