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

JTH Holding, Inc. Class A (NASDAQ:TAX) ups its rating to a B (“buy”) this week after earning a C (“hold”) in the week before. 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, Cash Flow, and Sales Growth, TAX also gets A’s. For more information, get Portfolio Grader’s complete analysis of TAX stock.

StoneMor Partners (NYSE:STON) improves from a C to a B rating 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.

This week, Service Corporation International (NYSE:SCI) is showing good progress as the company’s rating jumps from a B (“buy”) last week to an A (“strong buy”). 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.