Three Service stocks are moving up in their overall rating this week, according to the Portfolio Grader database. Every one of these is graded an “A” (“strong buy”) or “B” overall (“buy”).

This week, JTH Holding, Inc. Class A (NASDAQ:TAX) is showing significant improvement as the company’s rating hops from a C (“hold”) to a B (“buy”). JTH Holding provides federal and state tax preparation services and related financial products through retail offices and online in the United States and Canada. For more information, get Portfolio Grader’s complete analysis of TAX stock.

This week, StoneMor Partners’ (NYSE:STON) ratings are up from a C last week to a B. StoneMor Partners owns and operates the assets and businesses previously owned and operated by Cornerstone Family Services. The stock has a dividend yield of 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. The stock’s price of $19.11 is above the 50-day moving average of $18.38. 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.