Per-share prices of some publicly held plastics materials firms and processors got clobbered April 3 in the aftermath of global tariffs announced by President Donald Trump's administration.
Atkore Inc., Avient Corp., Celanese Corp., Chemours Co., Huntsman Corp., LyondellBasell and Myers Industries Inc. all were down more than 10 percent for the day. Celanese had the deepest fall, losing 16.6 percent of its value.
Dow Inc. and DuPont Co. just missed a 10 percent drop, declining 9.8 percent and 9.9 percent, respectively.
Per-share prices at Advanced Drainage Systems, AdvanSix Inc., Cabot Corp., Eastman Chemical Co., Hexcel Corp., Sealed Air, Trex Co., Westlake Corp., all were down 5-9 percent.
Amcor plc, AptarGroup Inc., Silgan Industries, Sonoco Products and Trinseo all saw more modest share price drops of 1-5 percent. Aptar saw the smallest drop, down just 1.2 percent.
By comparison, the Dow Jones Industrial Average fell almost 4 percent, with the broader S&P 500 down almost 5 percent and the Nasdaq index down almost 6 percent.
The Dow Jones was down almost 3 percent less than an hour after it opened April 4.
Trump claims the tariffs will "supercharge" U.S. industries, but plastics and manufacturing groups had a more skeptical reaction, warning of disruption and higher costs.
"These new tariffs will disrupt supply chains, increase production costs and undermine our global competitiveness," said Matt Seaholm, president and CEO of the Plastics Industry Association in Washington. Like some other business groups, it urged Trump to take a more focused approach.