The grades of six insurance stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Maiden Holdings, Ltd. (MHLD) is making headway this week, with the company’s rating improving to an A (“strong buy”) from a B (“buy”) last week. Maiden Holdings focuses on providing non-catastrophic, customized reinsurance products and services. In Portfolio Grader’s specific subcategory of Earnings Momentum, MHLD also gets an A. For more information, get Portfolio Grader’s complete analysis of MHLD stock.

American Financial Group, Inc. (AFG) is bumping up its rating from a C (“hold”) to a B (“buy”) this week. American Financial is engaged in property and casualty insurance. For more information, get Portfolio Grader’s complete analysis of AFG stock.

Meadowbrook Insurance Group, Inc.’s (MIG) ratings are looking better this week, moving up to an A from last week’s B. Meadowbrook Insurance Group provides alternative risk management programs and services. Shares of the stock have been changing hands at an unusually rapid pace, three times the rate of the week prior. For more information, get Portfolio Grader’s complete analysis of MIG stock.

This week, National Western Life Insurance Company Class A’s (NWLI) ratings are up from a C last week to a B. National Western Life Insurance sells life insurance and annuity products in the United States. 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 NWLI stock.

The rating of Employers Holdings, Inc. (EIG) moves up this week, rising from a C to a B. Employers Holdings operates in the commercial property and casualty insurance industry in the United States. For more information, get Portfolio Grader’s complete analysis of EIG stock.

This week, Hartford Financial Services Group, Inc. (HIG) pushes up from a C to a B rating. The Hartford Financial Services Group provides a range of insurance products. For more information, get Portfolio Grader’s complete analysis of HIG 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.