This week, 3 Diversified Telecommunication Services stocks are worse, according to the Portfolio Graderdatabase. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This week, BT Group PLC Sponsored ADR’s (BT) rating worsens to a F from the company’s D rating a week ago. BT Group PLC Sponsored ADR is a communications services company involved in the provision of fixed lines, broadband, mobile, and television products and services. The company also gets F’s in earnings growth. For more information, get Portfolio Grader’s complete analysis of BT stock.

Windstream Holdings, Inc. (WIN) gets weaker ratings this week as last week’s C drops to a D. Windstream Holdings, Inc. is a company that provides communications and technology solutions, including high-speed Internet access, digital television services, and voice services. The company also gets F’s in sales growth, earnings surprise, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of WIN stock.

Fusion Telecommunications International, Inc. (FSNN) slips from a D to a F this week. The company also gets F’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of FSNN 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.