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”).

This week, Maiden Holdings, Ltd. (MHLD) is making solid headway. The company’s rating improves to an A (“strong buy”) from last week’s B (“buy”) rating. 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 bettering its rating of C (“hold”) from last week 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.

This week, Meadowbrook Insurance Group, Inc.’s (MIG) ratings are up from a B last week to an A. Meadowbrook Insurance Group provides alternative risk management programs and services. 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 MIG stock.

The rating of National Western Life Insurance Company Class A (NWLI) moves up this week, rising from a C to a B. National Western Life Insurance sells life insurance and annuity products in the United States. Shares of the stock have been changing hands at an unusually rapid pace, twice the rate of the week prior. For more information, get Portfolio Grader’s complete analysis of NWLI stock.

Employers Holdings, Inc. (EIG) gets a higher grade this week, advancing from a C last week 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.

Hartford Financial Services Group, Inc.’s (HIG) ratings are looking better this week, moving up to a B from last week’s C. 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.