This week, the overall grades of 14 software stocks are lower, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

SRS Labs (SRSL) is on the decline this week, earning a D (“sell”) after receiving a C (“hold”) last week. 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. To get an in-depth look at SRSL, get Portfolio Grader’s complete analysis of SRSL stock.

American Software, Inc. Class A’s (AMSWA) rating falls this week to an F (“strong sell”), down from last week’s D (“sell”). American Software is involved in the development, marketing, and support of various software and services that deliver enterprise management and collaborative supply chain solutions to the global marketplace. The stock gets F’s in Earnings Growth, Earnings Revisions, Earnings Surprise and Sales Growth. Shares of the stock have been trading at an exceptionally rapid pace, up threefold from the week prior. The trailing PE Ratio for the stock is 32.60. For more information, get Portfolio Grader’s complete analysis of AMSWA stock.

This week, Interactive Intelligence Group, Inc.’s (ININ) rating worsens to an F from the company’s D rating a week ago. Interactive Intelligence provides software application suites for Voice over Internet Protocol business communications. The stock gets F’s in Earnings Growth, Earnings Momentum and Margin Growth. Shares of the stock are changing hands at twice the rate they were a week ago. To get an in-depth look at ININ, get Portfolio Grader’s complete analysis of ININ stock.

Slipping from a C to a D rating, Ultimate Software Group, Inc. (ULTI) takes a hit this week. Ultimate Software designs, develops, and markets unified HCM SaaS solutions for businesses. Shares of the stock have been changing hands at an unusually rapid pace, up 482.3% from the week prior. The stock has a trailing PE Ratio of 104.80. For more information, get Portfolio Grader’s complete analysis of ULTI stock.

Autodesk, Inc.’s (ADSK) rating weakens this week, dropping to a D versus last week’s C. Autodesk is a design software and services company. The stock gets F’s in Earnings Growth and Margin Growth. Shares of the stock have been changing hands at an unusually rapid pace, three times the rate of the week prior. The stock’s trailing PE Ratio is 103.60. To get an in-depth look at ADSK, get Portfolio Grader’s complete analysis of ADSK stock.

China Mobile Games & Entertainment Group Ltd. Sponsored ADR (CMGE) earns a D this week, moving down from last week’s grade of C. China Mobile Games and Entertainment Group engages in the development, operation, and sale of feature phone and smartphone games primarily in the People’s Republic of China. The stock also gets an F in Earnings Momentum. For more information, get Portfolio Grader’s complete analysis of CMGE stock.

Attunity Ltd (ATTU) experiences a ratings drop this week, going from last week’s C to a D. Attunity provides information availability software solutions for real-time data integration, application release automation, and managed file transfer. In Earnings Growth, Earnings Revisions, Earnings Surprise and Margin Growth the stock gets F’s. To get an in-depth look at ATTU, get Portfolio Grader’s complete analysis of ATTU stock.

Exa Corporation (EXA) earns a D this week, falling from last week’s grade of C. Exa develops, distributes, and supports simulation software and services. The stock gets F’s in Earnings Growth, Equity and Cash Flow. For more information, get Portfolio Grader’s complete analysis of EXA stock.

The rating of salesforce.com, inc. (CRM) declines this week from a C to a D. Salesforce.com offers businesses a technology platform for Internet-based computing, storage, and connectivity solutions. The stock also gets an F in Equity. To get an in-depth look at CRM, get Portfolio Grader’s complete analysis of CRM stock.

This is a rough week for TiVo (TIVO). The company’s rating falls to F from the previous week’s D. Tivo provides technology and services that allow consumers to watch and record live television. The stock receives F’s in Earnings Momentum, Earnings Revisions and Earnings Surprise. Equity and Margin Growth also get F’s. The stock currently has a trailing PE Ratio of 49.20. For more information, get Portfolio Grader’s complete analysis of TIVO stock.

Mavenir Systems, Inc. (MVNR) gets weaker ratings this week as last week’s C drops to a D. The stock gets F’s in Earnings Revisions and Equity. Shares of the stock have been trading at an exceptionally rapid pace, up twofold from the week prior. To get an in-depth look at MVNR, get Portfolio Grader’s complete analysis of MVNR stock.

Digimarc Corporation (DMRC) earns a D this week, falling from last week’s grade of C. Digimarc provides media identification and management solutions to commercial entities and government customers in the United States and internationally. The stock gets F’s in Earnings Revisions, Equity, Margin Growth and Sales Growth. For more information, get Portfolio Grader’s complete analysis of DMRC stock.

This is a rough week for NetSuite (N). The company’s rating falls to D from the previous week’s C. NetSuite provides relationship management software solutions. The stock gets F’s in Earnings Revisions and Equity. To get an in-depth look at N, get Portfolio Grader’s complete analysis of N stock.

Zynga Inc. Class A (ZNGA) experiences a ratings drop this week, going from last week’s D to an F. Zynga develops, markets, and operates online social games as live services played over the Internet and on social networking sites and mobile platforms. The stock gets F’s in Equity and Sales Growth. For more information, get Portfolio Grader’s complete analysis of ZNGA 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.