Oil prices climbed back above $100 a barrel and stock markets fell after three more cargo vessels were hit in the Gulf. News of further strikes on shipping helped to push Brent crude up by more than 9% on Thursday, before the price eased a little to $97.90. The jump came despite the International Energy Agency saying on Wednesday that it will release a record 400 million barrels of oil in an attempt to curb the economic impact of the US-Israel war with Iran. Investors are increasingly concerned