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

This week, MedAssets, Inc., (MDAS) falls to a D (“sell”), worse than last week’s grade of C (“hold”). MedAssets provides technology-enabled products and services for hospitals and health systems. In Portfolio Grader’s specific subcategories of Earnings Momentum and Earnings Revisions, MDAS also gets F’s. For more information, get Portfolio Grader’s complete analysis of MDAS stock.

Computer Programs and Systems, Inc. (CPSI) ratings are on the decline this week as the company earns an F (“strong sell”). Last week, it received a D (“sell”). Computer Programs and Systems is a healthcare information technology company that designs, develops, markets, installs, and supports computerized information technology systems for small and midsize hospitals. The stock gets F’s in Earnings Revisions and Earnings Surprise. As of May 27, 2015, 15.9% of outstanding Computer Programs and Systems, Inc. shares were held short. To get an in-depth look at CPSI, get Portfolio Grader’s complete analysis of CPSI stock.

This week, athenahealth, Inc. (ATHN) drops from a D to an F rating. Athenahealth provides ongoing billing, clinical-related, and other related services to medical group practices primarily in the United States. The stock also gets an F in Margin Growth. As of May 27, 2015, 29.2% of outstanding athenahealth, Inc. shares were held short. For more information, get Portfolio Grader’s complete analysis of ATHN 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.