The overall ratings of three diversified utilities stocks are down on Portfolio Grader this week. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

TECO Energy, Inc.’s (TE) rating falls this week to an F (“strong sell”), down from last week’s D (“sell”). TECO Energy is an energy-related holding company with businesses engaged in regulating electric and gas utility operations, coal mining, and unregulated electric generation. For Portfolio Grader’s specific subcategory of Sales Growth, TE also gets an F. For more information, get Portfolio Grader’s complete analysis of TE stock.

This week, Alliant Energy Corporation (LNT) falls to a D (“sell”), worse than last week’s grade of C (“hold”). Alliant Energy provides regulated electricity and natural gas services to residential, commercial, and industrial customers in the Midwest region of the United States. The stock also gets an F in Cash Flow. To get an in-depth look at LNT, get Portfolio Grader’s complete analysis of LNT stock.

Slipping from a C to a D rating, DTE Energy Company (DTE) takes a hit this week. DTE Energy provides electricity and natural gas sales, distribution and storage services throughout southeastern Michigan. For more information, get Portfolio Grader’s complete analysis of DTE 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.