The grades of three aerospace and defense stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Innovative Solutions and Support, Inc.’s (ISSC) grade is moving up to a B (“buy”) this week from last week’s C (“hold”). Innovative Solutions and Support designs, manufactures, and sells flight information computers, electronic displays, and advanced monitoring systems to the military and government, commercial air transport, and corporate aviation markets. In Portfolio Grader’s specific subcategories of Earnings Growth and Sales Growth, ISSC also gets A’s. For more information, get Portfolio Grader’s complete analysis of ISSC stock.

Precision Castparts’ (PCP) ratings are looking better this week, moving up to a B from last week’s C. Precision Castparts is a worldwide manufacturer of complex metal components and products, providing investment castings, forgings and fasteners/fastener systems for aerospace and industrial gas turbine applications. For more information, get Portfolio Grader’s complete analysis of PCP stock.

This is a strong week for AAR CORP. (AIR). The company’s rating climbs to B from the previous week’s C. AAR provides products and services to the worldwide aviation and defense industries. For more information, get Portfolio Grader’s complete analysis of AIR 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.