The overall ratings of four internet and web service stocks are down on Portfolio Grader this week. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

Internet Initiative Japan Inc. Sponsored ADR (IIJI) is on the decline this week, earning a D (“sell”) after receiving a C (“hold”) last week. Internet Initiative Japan develops and operates Internet access services and other Internet-related services in Japan. In Portfolio Grader’s specific subcategory of Sales Growth, IIJI also gets an F. For a full analysis of IIJI stock, visit Portfolio Grader.

This is a rough week for Internap Network Services Corporation (INAP). The company’s rating falls to D from the previous week’s C. Internap Network Services provides a broad range of scalable information technology infrastructure services for enterprises. For more information, get Portfolio Grader’s complete analysis of INAP stock.

Spark Networks, Inc. (LOV) earns an F (“strong sell”) this week, moving down from last week’s grade of D (“sell”). Spark Networks is a provider of online personals services in the United States and internationally. The stock gets F’s in Equity and Cash Flow. To get an in-depth look at LOV, get Portfolio Grader’s complete analysis of LOV stock.

The rating of Velti (VELT) declines this week from a D to an F. Velti is a global provider of mobile marketing and advertising solutions. The stock gets F’s in Earnings Growth and Earnings Momentum. For a full analysis of VELT 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.