President Donald Trump’s plan to refill the US’s emergency crude storage system — “right to the top,” in his words — would help protect against future oil-price shocks. But it’s easier said than done.

Oil prices fell on Tuesday after U.S. President Donald Trump declared a national energy emergency on his first day in office, raising concerns of higher U.S. output in a market widely expected to be ...

Oil futures ended lower on Tuesday as traders weighed prospects for crude supplies after President Donald Trump vowed to boost already record U.S. crude output, threatened to implement a steep tariff ...