The grades of 4 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”).

American International Group, Inc. (AIG) boosts its rating from a C to a B 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 A’s in free cash flow. For more information, get Portfolio Grader’s complete analysis of AIG stock.

This is a strong week for Selective Insurance Group, Inc. (SIGI). The company’s rating climbs to A from the previous week’s B. Selective Insurance Group, Inc. offers property and casualty insurance products and services the eastern and midwestern regions of the United States. The company also gets A’s in earnings revisions and free cash flow. For more information, get Portfolio Grader’s complete analysis of SIGI stock.

Progressive Corporation (PGR) improves from a B to a A rating this week. Progressive Corporation is an insurance holding company that offers primarily personal and commercial automobile insurance, in addition to other property-casualty insurance products. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of PGR stock.

Assured Guaranty Ltd. (AGO) shows solid improvement this week. The company’s rating rises from a C 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.

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.