The grades of 3 Insurance stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

Aon plc (AON) gets a higher grade this week, advancing from a C last week to a B. Aon plc provides risk management and human capital consulting services, including solutions to workforce productivity and insurance and reinsurance brokerage. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of AON stock.

Hallmark Financial Services, Inc. (HALL) is seeing ratings go up from a C last week to a B 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 A’s in operating margin growth, earnings growth, earnings surprise, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of HALL stock.

This week, MBIA Inc.’s (MBI) ratings are up from a C last week to a B. MBIA Inc. provides financial guarantee insurance and other forms of credit protection. The company also gets A’s in earnings revisions, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of MBI 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.