The grades of four Semiconductor stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Skyworks Solution (NASDAQ:SWKS) is bettering its rating of C (“hold”) from last week to a B (“buy”) this week. Skyworks Solutions is an innovator of analog and mixed-signal semiconductors. For more information, get Portfolio Grader’s complete analysis of SWKS stock.

This is a strong week for MagnaChip Semiconductor (NYSE:MX). The company’s rating climbs to B from the previous week’s C. Magnachip Semiconductor designs, develops, and manufactures mixed-signal and digital multimedia semiconductors. For more information, get Portfolio Grader’s complete analysis of MX stock.

FSI International

(NASDAQ:FSII) is progressing from last week’s rating of B (“buy”) as the company improves to an A (“strong buy”) this week. FSI International is a supplier of processing equipment used at key production steps to manufacture microelectronics, including semiconductor devices and thin film heads. For more information, get Portfolio Grader’s complete analysis of FSII stock.

ChipMOS TECHNOLOGIES (NASDAQ:IMOS) is seeing ratings go up from a B last week to a A this week. ChipMOS TECHNOLOGIES provides semiconductor testing and assembly services for LCD and other flat-panel display driver semiconductors, and memory and logic/mixed-signal products. Shares of the stock have been trading at an exceptionally rapid pace, up 606.1% from the week prior. For more information, get Portfolio Grader’s complete analysis of IMOS 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.