The grades of 3 Containers & Packaging stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

AEP Industries Inc. (AEPI) gets a higher grade this week, advancing from a B last week to a A. AEP Industries Inc. is a manufacturer of plastic packaging films in North America. The company also gets A’s in operating margin growth, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of AEPI stock.

Packaging Corporation of America (PKG) earns a B this week, jumping up from last week’s grade of C. Packaging Corporation of America engages in the manufacture and sale of containerboard and corrugated packaging products for industrial and consumer markets in the United States. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of PKG stock.

Ball Corporation (BLL) shows solid improvement this week. The company’s rating rises from a C to a B. Ball Corporation supplies metal and plastic packaging to the beverage, food, and household products industries. The company also gets A’s in earnings growth, earnings momentum, and return on equity. For more information, get Portfolio Grader’s complete analysis of BLL 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.