This week, five Diversified Utilities stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

National Grid (NYSE:NGG) is making progress this week as its rating of C (“hold”) from last week increases to a B (“buy”) rating this week. National Grid owns and operates the electricity transmission network in England and Wales, the gas transmission network in Great Britain, and electricity transmission networks in the Northeastern United States. In Portfolio Grader’s specific subcategories of Equity and Cash Flow, NGG also gets A’s. The stock has a dividend yield of 2.3%. For more information, get Portfolio Grader’s complete analysis of NGG stock.

This week, Black Hills (NYSE:BKH) is making solid headway. The company’s rating improves to an A (“strong buy”) from last week’s B (“buy”) rating. Black Hills is an energy company engaged in electric utilities and gas utilities segments, non-regulated energy group comprises oil and gas, power generation, and non-regulated energy groups. The stock price has risen 6.4% over the past month, better than the 2.7% increase the S&P 500 has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of BKH stock.

DTE Energy (NYSE:DTE) improves from a B to an A rating this week. DTE Energy provides electricity and natural gas sales, distribution and storage services throughout southeastern Michigan. The current dividend yield is 2.5%. For more information, get Portfolio Grader’s complete analysis of DTE stock.

This week, Public Service Enterprise Group’s (NYSE:PEG) ratings are up from a C last week to a B. Public Service Enterprise Group is a public utility holding company. For more information, get Portfolio Grader’s complete analysis of PEG stock.

This is a strong week for CenterPoint Energy (NYSE:CNP). The company’s rating climbs to B from the previous week’s C. CenterPoint Energy is a public utility holding company that operates electric transmission and distribution facilities, interstate pipelines, and facilities for gathering, processing, and treating natural gas. Wall Street seems to agree with the upgrade and has propelled the stock up 14.2% over the past month. For more information, get Portfolio Grader’s complete analysis of CNP 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.