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

Electronics for Imaging (NASDAQ:EFII) ups its rating to a B (“buy”) this week after earning a C (“hold”) in the week before. Electronics For Imaging designs and markets products that support color and black-and-white printing on a variety of peripheral devices. In Portfolio Grader’s specific subcategories of Earnings Growth and Margin Growth, EFII also gets A’s. Shares of EFII have increased 11.7% over the past month, better than the 4.5% increase the Nasdaq has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of EFII stock.

Western Digital’s (NASDAQ:WDC) ratings are looking better this week, moving up to a B from last week’s C. Western Digital designs, develops, manufactures, and sells hard drives. Wall Street has pushed the stock higher by 11.8% over the past month. The stock currently has a trailing PE Ratio of 5.00. For more information, get Portfolio Grader’s complete analysis of WDC stock.

NCR Corp. (NYSE:NCR) is making headway this week, with the company’s rating improving to an A (“strong buy”) from a B (“buy”) last week. NCR manufactures financial transaction machines and other products. Wall Street seems to agree with the upgrade and has propelled the stock up 14.5% over the past month. For more information, get Portfolio Grader’s complete analysis of NCR 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.