US Treasury Department labels China a currency manipulator US Treasury Department labels China a currency manipulator after Beijing pushes down the value of its yuan

WASHINGTON -- The U.S. Treasury Department labeled China a currency manipulator Monday after Beijing pushed down the value of its yuan in a dramatic escalation of the trade conflict between the world's two biggest economies.

The decision, which came hours after President Donald Trump accused China of unfairly devaluing its currency, marks a reversal for Treasury: In May, it had declined to sanction China for manipulating its currency.

The U.S. had not put China on the currency blacklist since 1994.

The designation could pave the way for more U.S. sanctions against China.

Earlier Monday, China had allowed its currency to weaken to an 11-year low, a move thatgives its exporters a price edge in world markets and eases some of the damage from U.S. tariffs on Chinese products.

Trump had gone on Twitter to denounce China's move as "currency manipulation." He added, "This is a major violation which will greatly weaken China over time."

In a statement, Treasury said it would work with the International Monetary Fund "to eliminate the unfair competitive advantage created by China's latest actions."

The move was unexpected.

"This is an extraordinary action of hostility against a major trading partner, with little economic basis and again driven mostly by presidential whims," said Cornell University economist Eswar Prasad, former head of the China division at the International Monetary Fund. "The timing and apparent logic for Treasury's designation of China as a currency manipulator reeks of arbitrariness