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”).

This week, Tractor Supply Company (TSCO) is showing significant improvement as the company’s rating hops from a C (“hold”) to a B (“buy”). Tractor Supply operates retail farm and ranch stores in the United States. In Portfolio Grader’s specific subcategory of Equity, TSCO also gets an A. For more information, get Portfolio Grader’s complete analysis of TSCO stock.

The rating of Williams-Sonoma, Inc. (WSM) moves up this week, rising from a C to a B. Williams-Sonoma is a retailer of home products, mainly culinary and serving equipment. Shares of the stock have been trading at an exceptionally rapid pace, up twofold from the week prior. For more information, get Portfolio Grader’s complete analysis of WSM stock.

Signet Jewelers Limited’s (SIG) ratings are looking better this week, moving up to a B from last week’s C. Signet Jewelers is engaged in the retailing of jewelry, watches and gifts with branches throughout UK and US. 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 SIG stock.

Gap, Inc. (GPS) earns a B this week, jumping up from last week’s grade of C. Gap is an international specialty retailer operating retail and outlet stores. Shares of the stock have been trading at an exceptionally rapid pace, up twofold from the week prior. For more information, get Portfolio Grader’s complete analysis of GPS 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.