For the current week, the overall ratings of three software stocks are worse, according to the Portfolio Graderdatabase. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

SRS Labs’ (SRSL) rating falls to a D (“sell”) this week, down from C (“hold”) the week prior. SRS Labs develops and licenses audio and voice enhancement technologies. In Portfolio Grader’s specific subcategories of Earnings Growth and Margin Growth, SRSL also gets F’s. For more information, get Portfolio Grader’s complete analysis of SRSL stock.

FireEye, Inc. (FEYE) earns a D this week, moving down from last week’s grade of C. The stock gets F’s in Earnings Momentum and Equity. As of Oct. 9, 2014, 11.2% of outstanding FireEye, Inc. shares were held short. Shares of the stock have been exchanging at an usually rapid pace, twice the rate of the week prior. To get an in-depth look at FEYE, get Portfolio Grader’s complete analysis of FEYE stock.

Actuate Corporation’s (BIRT) rating falls this week to an F (“strong sell”), down from last week’s D (“sell”). Actuate provides software and services to develop and deploy Rich Information Applications. The stock gets F’s in Earnings Revisions, Earnings Surprise and Margin Growth. Shares of the stock have been trading at an exceptionally rapid pace, up fourfold from the week prior. For more information, get Portfolio Grader’s complete analysis of BIRT 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.