This week, 4 Communications Equipment stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

Arista Networks, Inc. (ANET) shows solid improvement this week. The company’s rating rises from a C to a B. The company also gets A’s in sales growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of ANET stock.

The rating of Ruckus Wireless, Inc. (RKUS) moves up this week, rising from a D to a B. For more information, get Portfolio Grader’s complete analysis of RKUS stock.

Norsat International Inc. (NSAT) improves from a C to a B rating this week. The company also gets A’s in operating margin growth, earnings revisions, earnings momentum, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of NSAT stock.

This is a strong week for Extreme Networks, Inc. (EXTR). The company’s rating climbs to B from the previous week’s C. Extreme Networks, Inc. provides network infrastructure equipment and services for enterprises, data centers, and service providers. For more information, get Portfolio Grader’s complete analysis of EXTR 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.