This week, the overall grades of 4 Health Care Equipment & Supplies stocks are lower, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Abbott Laboratories (ABT) is having a tough week. The company’s rating falls from a C to a D. Abbott Laboratories discovers, develops, manufactures, and sells health care products. The company also gets F’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of ABT stock.

This week, Halyard Health Inc (HYH) drops from a D to a F rating. The company also gets F’s in operating margin growth, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of HYH stock.

Entellus Medical, Inc.’s (ENTL) rating weakens this week, dropping to a F versus last week’s D. The company also gets F’s in earnings revisions and return on equity. For more information, get Portfolio Grader’s complete analysis of ENTL stock.

Invacare Corporation (IVC) earns a F this week, moving down from last week’s grade of D. Invacare Corporation manufactures and distributes health care products to the non-acute care market on a worldwide basis. The company also gets F’s in earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of IVC 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.