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

Ambac Financial Group, Inc. (AMBC) is on the decline this week, earning a D (“sell”) after receiving a C (“hold”) last week. The stock also earns F’s in Portfolio Grader’s specific subcategories of Earnings Growth, Earnings Momentum, Margin Growth and Sales Growth. To get an in-depth look at AMBC, get Portfolio Grader’s complete analysis of AMBC stock.

Independence Holding Company (IHC) gets weaker ratings this week as last week’s C drops to a D. Independence Holding sells life and health insurance. The stock also gets an F in Sales Growth. For more information, get Portfolio Grader’s complete analysis of IHC stock.

This week, United Fire Group, Inc.’s (UFCS) rating worsens to a D from the company’s C rating a week ago. 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. 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.