Trump announces 50% tariff on copper effective August 1

FILE PHOTO: Copper cathodes are seen inside a warehouse near Yangshan Deep Water Port, south of Shanghai March 23, 2012. REUTERS/Carlos Barria/File Photo

WASHINGTON (Reuters) -U.S. President Donald Trump announced on Wednesday a 50% tariff on copper, saying on social media that it would be effective August 1 and that the decision was made after a national security assessment.

(Reporting by Kanishka Singh; Editing by Sandra Maler)