Insurance companies seem like stable, reliable companies. They take in regular premiums and dish out regular dividends to shareholders, right? Well, unfortunately, the spate of bad weather that included Midwestern tornadoes has hurt many insurers. And as we enter the summer hurricane season, it could be bad news for these picks in the short term.

I watch more than 5,000 publicly traded companies with my Portfolio Grader tool, ranking companies by a number of fundamental and quantitative measures. And this week, 9 insurance stocks to sell.

Here they are, in alphabetical order. Each one of these stocks gets a “D” or “F” according to my research, meaning it is a “sell” or “strong sell.”

AFLAC Inc. (NYSE:AFL) is the insurance company best known for its quacking-duck commercials. In the last year, AFL stock has lost 20%, compared to a 6% gain for the Dow Jones in the same time. Aflac gets an “F” grade for sales growth, a “D” grade for earnings growth, an “F” grade for earnings momentum, a “D” grade for the magnitude in which earnings projections have increased over the past months and a “D” grade for return on equity in my Portfolio Grader tool. For more information, view my complete analysis of AFL stock.

American International Group Inc. (NYSE:AIG) works with customers in more than 130 countries. Since last March, AIG stock is down 21%. AIG gets an “F” grade for sales growth, a “D” grade for earnings growth, an “F” grade for cash flow and a “D” grade for return on equity in my Portfolio Grader tool. For more information, view my complete analysis of AIG stock.

AON Corp. (NYSE:AON) provides risk-management services and many other insurance services. AON stock has lost 8% in the last 12 months. AON stock gets a “D” grade for sales growth and a “D” grade for the magnitude in which earnings projections have increased over the past months in my Portfolio Grader tool. For more information, view my complete analysis of AON stock.

Hartford Financial Services Group Inc. (NYSE:HIG) is an insurance and financial-services company that has posted a loss of 30% in the last 12 months. Hartford stock gets a “D” grade for sales growth, an “F” grade for operating margin growth, an “F” grade for earnings growth, an “F” grade for earnings momentum, a “D” grade for the magnitude in which earnings projections have increased over the past months and a “D” grade for return on equity in my Portfolio Grader tool. For more information, view my complete analysis of HIG stock.

Lincoln National Corp. (NYSE:LNC) operates multiple insurance and retirement businesses. Since this time last March, LNC stock has posted a loss of 20%. Lincoln stock gets a “D” grade for sales growth, an “F” grade for operating margin growth, an “F” grade for earnings growth, an “F” grade for earnings momentum and a “D” grade for its ability to exceed the consensus earnings estimates on Wall Street in my Portfolio Grader tool. For more information, view my complete analysis of LNC stock.

Manulife Financial Corp. (NYSE:MFC) is a life insurance holding company that has posted a significant loss of 36% in the last year. Manulife stock gets an “F” grade for earnings momentum, a “D” grade for its ability to exceed the consensus earnings estimates on Wall Street and a “D” grade for return on equity in my Portfolio Grader tool. For more information, view my complete analysis of MC stock.

Principal Financial Group Inc. (NYSE:PFG) provides its customers with retirement savings, investment and insurance products and services. In the past 12 months, PFG stock has slid 18%. Principal stock gets an “F” grade for sales growth, a “D” grade for earnings growth, a “D” grade for earnings momentum and a “D” grade for its ability to exceed the consensus earnings estimates on Wall Street in my Portfolio Grader tool. For more information, view my complete analysis of PFG stock.

Unum Group (NYSE:UNM) owns both insurance and non-insurance subsidiaries.UNM stock has dropped 10% in the last 52 weeks. UNM stock gets a “D” grade for sales growth, an “F” grade for operating margin growth, an “F” grade for earnings growth, an “F” grade for earnings momentum, a “D” grade for cash flow and a “D” grade for return on equity in my Portfolio Grader tool. For more information, view my complete analysis of UNM stock.

XL Group PLC (NYSE:XL) provides property, casualty and specialty products to its wide base of customers. XL stock rounds out the list with a 10% loss in the last year. XL stock gets an “F” grade for operating margin growth, an “F” grade for earnings growth, an “F” grade for earnings momentum, an “F” grade for the magnitude in which earnings projections have increased over the past months, a “D” grade for cash flow and a “D” grade for return on equity in my Portfolio Grader tool. For more information, view my complete analysis of XL stock.

Get more analysis of these picks and other publicly traded stocks with Louis Navellier’s Portfolio Grader tool, a 100% free stock-rating tool that measures both quantitative buying pressure and eight fundamental factors.