US President Donald Trump’s plan to revoke Chevron Corp.’s operating license in Venezuela threatens to force the nation’s oil sector back into the shadows, paving the way for corruption and huge discounts in the Asian market.

Oil prices rose more than 2% on Thursday as supply concerns resurfaced after U.S. President Donald Trump revoked a licence granted to U.S. oil major Chevron to operate in Venezuela. Investors were still keeping an eye on signs of a potential peace deal in Ukraine,

The United States is rescinding a Treasury license allowing Chevron to produce and export oil from Venezuela, despite U.S. sanctions, President Donald Trump said Wednesday, because President Nicolás Maduro was not legitimately elected and has not accepted Venezuelans deported from this country fast enough.