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

Williams-Sonoma, Inc. (WSM) ups its rating to a B (“buy”) this week after earning a C (“hold”) in the week before. Williams-Sonoma is a retailer of home products, mainly culinary and serving equipment. In Portfolio Grader’s specific subcategory of Equity, WSM also gets an A. For more information, get Portfolio Grader’s complete analysis of WSM stock.

Signet Jewelers Limited (SIG) improves from a C to a B rating this week. Signet Jewelers is engaged in the retailing of jewelry, watches and gifts with branches throughout UK and US. For more information, get Portfolio Grader’s complete analysis of SIG stock.

Gap, Inc.’s (GPS) ratings are looking better this week, moving up to a B from last week’s C. Gap is an international specialty retailer operating retail and outlet stores. Shares of the stock have been changing hands at an unusually rapid pace, twice the rate of the week prior. For more information, get Portfolio Grader’s complete analysis of GPS stock.

Tractor Supply Company (TSCO) gets a higher grade this week, advancing from a C last week to a B. Tractor Supply operates retail farm and ranch stores in the United States. For more information, get Portfolio Grader’s complete analysis of TSCO 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.