The ratings of 6 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, Prudential Financial, Inc.’s (PRU) rating worsens to a D from the company’s C rating a week ago. Prudential Financial, Inc. provides financial services throughout the United States and several locations worldwide. For more information, get Portfolio Grader’s complete analysis of PRU stock.

Slipping from a C to a D rating, American International Group, Inc. (AIG) takes a hit this week. American International Group, Inc. is engaged in a range of insurance and insurance-related activities in the United States and abroad. The company also gets F’s in sales growth, operating margin growth, earnings growth, earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of AIG stock.

Principal Financial Group, Inc. (PFG) is having a tough week. The company’s rating falls from a C to a D. Principal Financial Group, Inc. offers businesses, individuals and institutional clients a range of financial products and services. For more information, get Portfolio Grader’s complete analysis of PFG stock.

This is a rough week for Manulife Financial Corporation (MFC). The company’s rating falls to D from the previous week’s C. Manulife Financial Corporation provides financial protection products and investment management services to individuals, families, businesses, and groups. For more information, get Portfolio Grader’s complete analysis of MFC stock.

Hallmark Financial Services, Inc. (HALL) slips from a C to a D this week. Hallmark Financial Services, Inc. is a diversified property/casualty insurance group that serves businesses and individuals in specialty and niche markets. The company also gets F’s in earnings surprise and earnings momentum. For more information, get Portfolio Grader’s complete analysis of HALL stock.

This week, Patriot National, Inc. (PN) drops from a C to a D rating. For more information, get Portfolio Grader’s complete analysis of PN 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.