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

This week, Lexmark International, Inc. Class A (LXK) is showing significant improvement as the company’s rating hops from a C (“hold”) to a B (“buy”). Lexmark International develops, manufactures, and supplies printing and imaging solutions for offices and homes. In Portfolio Grader’s specific subcategories of Earnings Momentum, Earnings Revisions, Equity and Cash Flow, LXK also gets A’s. Shares of LXK have increased 10.2% over the past month, better than the 1.7% decrease the S&P 500 has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of LXK stock.

Seagate Technology PLC (STX) boosts its rating from a C to a B this week. Seagate Technology designs, manufactures, markets and sells hard disk drives. For more information, get Portfolio Grader’s complete analysis of STX stock.

This week, SanDisk Corporation (SNDK) pushes up from a C to a B rating. Sandisk designs, develops, manufactures and markets flash memory card products, including USB drives and memory cards that can be used in mobile phones and digital cameras. For more information, get Portfolio Grader’s complete analysis of SNDK stock.

Xyratex Ltd (XRTX) shows solid improvement this week. The company’s rating rises from a C to a B. Xyratex provides modular solutions for the enterprise data storage industry and hard disk drive (HDD) capital equipment for the HDD industry. For more information, get Portfolio Grader’s complete analysis of XRTX stock.

This week, Hewlett-Packard Company (HPQ) is making solid headway. The company’s rating improves to an A (“strong buy”) from last week’s B (“buy”) rating. Hewlett-Packard provides imaging and printing systems, computing systems, and information technology services for business and home. For more information, get Portfolio Grader’s complete analysis of HPQ stock.

This week, Novatel Wireless, Inc.’s (NVTL) ratings are up from a C last week to a B. Novatel Wireless provides wireless data modems and software for use with handheld computing devices and portable personal electronics. For more information, get Portfolio Grader’s complete analysis of NVTL 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.