US President Donald Trump said the tariff will not impact companies if they have already invested in US facilities.

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United States President Donald Trump says he will impose a 100 percent tariff on foreign-made semiconductors, although exemptions will be made for companies that have invested in the US.

“We’ll be putting a tariff on of approximately 100 percent on chips and semiconductors, but if you’re building in the United States of America, there’s no charge, even though you’re building and you’re not producing yet,” Trump told reporters at the Oval Office on Wednesday evening.

The news came after a separate announcement that Apple would invest $600bn in the US, but it was not unexpected by US observers.