This week, the ratings of 4 Internet Software & Services stocks on Portfolio Grader are down. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

MercadoLibre, Inc. (MELI) experiences a ratings drop this week, going from last week’s C to a D. MercadoLibre, Inc. operates an online trading site for the Latin American markets. The company also gets F’s in earnings revisions and earnings surprise. For more information, get Portfolio Grader’s complete analysis of MELI stock.

YY, Inc. Sponsored ADR Class A (YY) gets weaker ratings this week as last week’s C drops to a D. YY, Inc. Sponsored ADR Class A operates an online social platform in the People’’s Republic of China. For more information, get Portfolio Grader’s complete analysis of YY stock.

Selectica, Inc. (SLTC) earns a D this week, moving down from last week’s grade of C. Selectica, Inc. is dedicated to enabling companies to close deals faster, more profitably, and with lower risk. The company also gets F’s in return on equity and free cash flow. For more information, get Portfolio Grader’s complete analysis of SLTC stock.

This is a rough week for Prism Technologies Group, Inc. (PRZM). The company’s rating falls to D from the previous week’s C. The company also gets F’s in earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of PRZM 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.