This week, seven Insurance stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

This week, W.R. Berkley (NYSE:WRB) is showing good progress as the company’s rating jumps from a B (“buy”) last week to an A (“strong buy”). W. R. Berkley is an insurance holding company in the United States, which operates in five business segments: specialty insurance, regional property casualty insurance, alternative markets, reinsurance and international. In Portfolio Grader’s specific subcategories of Earnings Surprise and Cash Flow, WRB also gets A’s. Shares of WRB have increased 11.6% over the past month, better than the 1.7% decrease the S&P 500 has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of WRB stock.

This week, XL Group’s (NYSE:XL) ratings are up from a B last week to an A. XL Group provides property, casualty and specialty products to industrial, commercial and professional firms worldwide. Investors have pushed the stock price up 11% over the past month. For more information, get Portfolio Grader’s complete analysis of XL stock.

This week, National Western Life Insurance (NASDAQ:NWLI) is showing significant improvement as the company’s rating hops from a C (“hold”) to a B (“buy”). National Western Life Insurance sells life insurance and annuity products in the United States. Wall Street has pushed the stock higher by 16.5% over the past month. For more information, get Portfolio Grader’s complete analysis of NWLI stock.

This week, American National Insurance (NASDAQ:ANAT) pushes up from a C to a B rating. American National Insurance offers financial products and services, individual and group health insurance and annuities, credit insurance, pension products, and mutual funds. Wall Street seems to agree with the upgrade and has propelled the stock up 14.3% over the past month. At present, the stock has a dividend yield of 3.1%. For more information, get Portfolio Grader’s complete analysis of ANAT stock.

Endurance Specialty (NYSE:ENH) gets a higher grade this week, advancing from a C last week to a B. Endurance Specialty Holdings is the holding company for Endurance Specialty Insurance, which provides property and casualty insurance and reinsurance. Investors seem to agree with the upgraded status of the stock, and have pushed the stock up 7.9% over the past month. For more information, get Portfolio Grader’s complete analysis of ENH stock.

Aspen Insurance Holdings (NYSE:AHL) boosts its rating from a B to an A this week. Aspen Insurance Holdings provides insurance and reinsurance solutions worldwide. Wall Street seems to agree with the upgrade and has propelled the stock up 6.4% over the past month. For more information, get Portfolio Grader’s complete analysis of AHL stock.

EMC Insurance (NASDAQ:EMCI) improves from a C to a B rating this week. EMC Insurance focuses on the sale of commercial lines of property and casualty insurance to small and medium-sized businesses, institutions, and individual customers through independent insurance agents. Wall Street has pushed the stock higher by 10.5% over the past month. For more information, get Portfolio Grader’s complete analysis of EMCI 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.