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

Cree (NASDAQ:CREE) is bumping up its rating from a C (“hold”) to a B (“buy”) this week. Cree develops and manufactures semiconductor materials and devices. In Portfolio Grader’s specific subcategory of Earnings Momentum, CREE also gets an A. Shares of CREE have increased 6.8% over the past month, better than the 0.6% decrease the Nasdaq has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of CREE stock.

This week, FSI International (NASDAQ:FSII) is making solid headway. The company’s rating improves to an A (“strong buy”) from last week’s B (“buy”) rating. 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.

MIPS Technologies (NASDAQ:MIPS) improves from a B to a A rating this week. MIPS Technologies designs high-performance processors and related intellectual property for use in a variety of consumer devices and business equipment. For more information, get Portfolio Grader’s complete analysis of MIPS stock.

This is a strong week for Rudolph Technologies (NASDAQ:RTEC). The company’s rating climbs to B from the previous week’s C. Rudolph Technologies is engaged in the design, development, and manufacture of high-performance process control equipment used by semiconductor device manufacturers. Wall Street seems to agree with the upgrade and has propelled the stock up 10.4% over the past month. For more information, get Portfolio Grader’s complete analysis of RTEC 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.