The ratings of three electric utilities stocks are down this week, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This week, Korea Electric Power Corporation Sponsored ADR (KEP) falls to a D (“sell”), worse than last week’s grade of C (“hold”). Korea Electric Power generates, transmits, and distributes electricity to South Korea for a variety of uses. KEP also rates an F in Portfolio Grader’s specific subcategory of Earnings Revisions. For more information, get Portfolio Grader’s complete analysis of KEP stock.

Pampa Energia SA Sponsored ADR (PAM) is having a tough week. The company’s rating falls from a C to a D. Pampa Energia is a fully integrated electricity company in Argentina. The stock gets F’s in Earnings Momentum, Cash Flow and Sales Growth. The stock price has fallen 20.6% over the past month, worse than the 1.7% decrease the S&P 500 has seen over the same period of time. To get an in-depth look at PAM, get Portfolio Grader’s complete analysis of PAM stock.

Companhia Paranaense de Energia Sponsored ADR Pfd Class B (ELP) earns an F (“strong sell”) this week, moving down from last week’s grade of D (“sell”). Companhia Paranaense de Energia – Copel is engaged in the generation, transmission, distribution and sale of electricity in the Brazilian State of Parana, pursuant to concessions granted by the Brazilian regulatory agency for the electricity sector, ANEEL. For a full analysis of ELP stock, visit Portfolio Grader.

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.