Donald Trump posts ‘Let the oil flow’ as US-Iran peace deal sparks immediate drop for Brent crude

• Middle East crisis: live updates

• Peace deal between US and Iran announced, with strait of Hormuz expected to reopen

• What do we know about the US-Iran peace deal – and what questions remain?

Global oil prices have tumbled and stock markets rallied amid fresh hopes that a US-Iran peace deal may end the greatest energy supply crisis in the history of the market.

The price of Brent crude dropped 4% to below $84 (£62) a barrel as the new trading week began in financial centres across Asia-Pacific, amid optimism that the strait of Hormuz could reopen shortly and bring a return of Gulf oil exports to the market.