The ratings of 7 Software stocks are down this week, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This is a rough week for Aspen Technology, Inc. (AZPN). The company’s rating falls to D from the previous week’s C. Aspen Technology, Inc. is a global provider of mission-critical process optimization software solutions, which are designed to manage and optimize plant and process design, operational performance, and supply chain planning. For more information, get Portfolio Grader’s complete analysis of AZPN stock.

ACI Worldwide, Inc. (ACIW) earns a D this week, moving down from last week’s grade of C. ACI Worldwide, Inc. develops, markets, installs, and provides support for a line of products and services that facilitate electronic payments. The company also gets F’s in earnings revisions. For more information, get Portfolio Grader’s complete analysis of ACIW stock.

Slipping from a C to a D rating, Varonis Systems, Inc. (VRNS) takes a hit this week. The company also gets F’s in return on equity. For more information, get Portfolio Grader’s complete analysis of VRNS stock.

This week, Workiva, Inc. Class A’s (WK) rating worsens to a D from the company’s C rating a week ago. The company also gets F’s in earnings revisions and return on equity. For more information, get Portfolio Grader’s complete analysis of WK stock.

EnerNOC, Inc. (ENOC) declines this week from a C to a D. EnerNOC, Inc. develops and provides clean and intelligent power solutions to commercial, institutional and industrial customers, as well as electric power grid operators and utilities. The company also gets F’s in operating margin growth, earnings surprise, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of ENOC stock.

Glu Mobile Inc.’s (GLUU) rating weakens this week, dropping to a F versus last week’s D. Glu Mobile Inc. develops and publishes mobile games on a global basis. The company also gets F’s in sales growth, operating margin growth, earnings growth, and earnings revisions. For more information, get Portfolio Grader’s complete analysis of GLUU stock.

FalconStor Software, Inc. (FALC) slips from a C to a D this week. FalconStor Software, Inc. provides a software-only storage networking solution that simplifies storage management. The company also gets F’s in sales growth. For more information, get Portfolio Grader’s complete analysis of FALC 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.