This week, four Internet and Web Service stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Yahoo! (NASDAQ:YHOO) ups its rating to a B (“buy”) this week after earning a C (“hold”) in the week before. Yahoo is a digital media company that delivers personalized digital content and experiences across devices worldwide. The stock price has risen 9.8% over the past month, better than the 3% decrease the Nasdaq has seen over the same period of time. The stock currently has a trailing PE Ratio of 5.60. For more information, get Portfolio Grader’s complete analysis of YHOO stock.

This week, eBay (NASDAQ:EBAY) is showing good progress as the company’s rating jumps from a B (“buy”) last week to an A (“strong buy”). eBay is a web-based consumer-to-consumer company in the online auction and shopping industry with operations localized in over thirty countries. For more information, get Portfolio Grader’s complete analysis of EBAY stock.

Akamai (NASDAQ:AKAM) boosts its rating from a C to a B this week. Akamai provides services for accelerating and improving the delivery of content and applications over the Internet. For more information, get Portfolio Grader’s complete analysis of AKAM stock.

This is a strong week for NIC Inc. (NASDAQ:EGOV). The company’s rating climbs to B from the previous week’s C. NIC provides Internet-based electronic government solutions. For more information, get Portfolio Grader’s complete analysis of EGOV 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.