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

Accretive Health, Inc. (AH) earns an F (“strong sell”) this week, moving down from last week’s grade of D (“sell”). Accretive provides revenue cycle management services for hospitals and healthcare providers in the United States. In Portfolio Grader’s specific subcategories of Earnings Growth, Earnings Momentum and Earnings Revisions, AH also gets an F. The stock currently has a trailing PE Ratio of 60.00. To get an in-depth look at AH, get Portfolio Grader’s complete analysis of AH stock.

Community Health Systems, Inc.’s (CYH) rating falls to a D (“sell”) this week, down from C (“hold”) the week prior. Community Health Systems provides healthcare services through hospitals that it owns and operates in the United States. The stock gets F’s in Earnings Growth, Earnings Momentum and Earnings Revisions. For a full analysis of CYH stock, visit Portfolio Grader.

Tenet Healthcare Corporation (THC) earns a D this week, falling from last week’s grade of C. Tenet Healthcare is an investor-owned health care services company that mainly operates general hospitals and related health care facilities, such as outpatient surgery centers, diagnostic imaging centers and a number of medical office buildings. The stock gets F’s in Earnings Momentum, Earnings Revisions and Margin Growth. To get an in-depth look at THC, get Portfolio Grader’s complete analysis of THC 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.