This week, 5 Insurance stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

Enstar Group Limited (ESGR) improves from a C to a B rating this week. Enstar Group Limited acquires and manages insurance and reinsurance companies in run-off. The company also gets A’s in sales growth, earnings growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of ESGR stock.

Aflac Incorporated (AFL) shows solid improvement this week. The company’s rating rises from a C to a B. Aflac Incorporated primarily sells supplemental health and life insurance in the United States and Japan. The company also gets A’s in free cash flow. For more information, get Portfolio Grader’s complete analysis of AFL stock.

Assured Guaranty Ltd. (AGO) gets a higher grade this week, advancing from a C last week to a B. Assured Guaranty Ltd. provides credit enhancement products to the public finance, structured finance, and mortgage markets. The company also gets A’s in earnings revisions, earnings surprise, and free cash flow. For more information, get Portfolio Grader’s complete analysis of AGO stock.

Independence Holding Company (IHC) is seeing ratings go up from a C last week to a B this week. Independence Holding Company sells life and health insurance. The company also gets A’s in operating margin growth, earnings growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of IHC stock.

This is a strong week for Hallmark Financial Services, Inc. (HALL). The company’s rating climbs to B from the previous week’s C. 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 A’s in operating margin growth, earnings growth, earnings revisions, earnings surprise, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of HALL 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.