Fiber Maker Slumps Amid Eastman Chemical Contract Dispute

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Rayonier Advanced Materials Inc., a U.S. maker of cellulose fiber, plunged 44 percent after its largest customer disputed the terms of a supply contract.

The shares tumbled to $7.62 at the close in New York, the most since the Jacksonville, Florida-based company began trading in June 2014. A record 18 million shares traded Wednesday, according to data compiled by Bloomberg.