The president-elect's threat comes just days after he threatened big tariffs on Mexico, Canada and China. Experts warn of higher prices.

President-elect Donald Trump said he would require countries that are part of BRICS — a China- and Russia-backed group of emerging economies — to commit to not creating new currency or face 100% tariffs during his administration.

His threat was directed at countries in the so-called BRIC alliance, which consists of Brazil, Russia, India, China, South Africa, Egypt, Ethiopia, Iran and the United Arab Emirates.