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

Taomee Holdings (NYSE:TAOM) is on the decline this week, earning a D (“sell”) after receiving a C (“hold”) last week. Taomee Holdings produces children’s entertainment. In Portfolio Grader’s specific subcategories of Earnings Surprise and Margin Growth, TAOM also gets F’s. The stock price has dropped 21.3% over the past month, worse than the 2% increase the S&P 500 has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of TAOM stock.

SRS Labs’ (NASDAQ:SRSL) rating weakens this week, dropping to a D versus last week’s C. SRS Labs develops and licenses audio and voice enhancement technologies. The stock gets F’s in Earnings Growth and Margin Growth. For a full analysis of SRSL stock, visit Portfolio Grader.

The rating of TeleNav Inc. (NASDAQ:TNAV) declines this week from C to a D. TeleNav provides location-based solutions. The stock gets F’s in Earnings Growth, Earnings Momentum, and Margin Growth. For more information, get Portfolio Grader’s complete analysis of TNAV stock.

Red Hat (NYSE:RHT) is having a tough week. The company’s rating falls from C to a D. Red Hat provides open source software solutions that customers are allowed to update, monitor and manage. The stock price has fallen 6.7% over the past month. The trailing PE Ratio for the stock is 66.70. For a full analysis of RHT stock, visit Portfolio Grader.

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.