This week, the overall grades of 4 Aerospace & Defense stocks are lower, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

This week, Spirit AeroSystems Holdings, Inc. Class A (SPR) drops from a C to a D rating. Spirit AeroSystems Holdings, Inc. Class A is engaged in designing and manufacturing of commercial aero structures and systems. For more information, get Portfolio Grader’s complete analysis of SPR stock.

Hexcel Corporation’s (HXL) rating weakens this week, dropping to a D versus last week’s C. Hexcel Corporation develops, manufactures, and markets reinforcement products, composite materials, and engineered products. For more information, get Portfolio Grader’s complete analysis of HXL stock.

KLX, Inc. (KLXI) declines this week from a C to a D. The company also gets F’s in sales growth, operating margin growth, and free cash flow. For more information, get Portfolio Grader’s complete analysis of KLXI stock.

Engility Holdings, Inc. (EGL) gets weaker ratings this week as last week’s C drops to a D. Engility Holdings, Inc. provides government services in systems engineering, training, program management, and operational support to the U.S. government worldwide. The company also gets F’s in operating margin growth, earnings growth, earnings revisions, earnings momentum, and free cash flow. For more information, get Portfolio Grader’s complete analysis of EGL 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.