The grades of three service stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

This week, JTH Holding, Inc. Class A (TAX) is making solid headway. The company’s rating improves to an A (“strong buy”) from last week’s B (“buy”) rating. JTH Holding provides federal and state tax preparation services and related financial products through retail offices and online in the United States and Canada. In Portfolio Grader’s specific subcategories of Earnings Momentum, Equity and Sales Growth, TAX also gets A’s. For more information, get Portfolio Grader’s complete analysis of TAX stock.

StoneMor Partners (STON) is bettering its rating of C (“hold”) from last week to a B (“buy”) this week. StoneMor Partners owns and operates the assets and businesses previously owned and operated by Cornerstone Family Services. The stock’s dividend yield is 2.4%. For more information, get Portfolio Grader’s complete analysis of STON stock.

The rating of Service Corporation International (SCI) moves up this week, rising from a B to an A. Service Corporation is a provider of deathcare products and services in North America. For more information, get Portfolio Grader’s complete analysis of SCI 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.