Oil prices fell more than 1% on Monday after U.S. President Trump called on OPEC to reduce prices following the announcement of wide-ranging measures to boost U.S. oil and gas output in his first week in office.

"You've got to bring down the oil price, you've got to end that war. They should have done it long ago," President Donald Trump said.

U.S. President Donald Trump on Thursday proved that words can be just as powerful as actions — at least temporarily — after his promise to ask the Saudis and OPEC to lower the cost of oil led to a downturn in crude prices.