This week, 3 Construction & Engineering stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

The rating of Argan, Inc. (AGX) moves up this week, rising from a C to a B. Argan, Inc. plans, builds, manages and leases warehouses. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of AGX stock.

MasTec, Inc. (MTZ) boosts its rating from a C to a B this week. MasTec, Inc. an infrastructure construction company, engages in the engineering, building, installation, maintenance, and upgrade of energy, utility, and communications infrastructure primarily in North America. The company also gets A’s in earnings surprise. For more information, get Portfolio Grader’s complete analysis of MTZ stock.

Goldfield Corporation (GV) is seeing ratings go up from a C last week to a B this week. Goldfield Corporation conducts electrical construction operations, including the placement of fiber optic cable and is also engaged in real estate operations. The company also gets A’s in earnings growth. For more information, get Portfolio Grader’s complete analysis of GV 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.