If the nuclear dispute with Iran were to escalate so that, say, the straits of Hormuz were blocked and crude jumped to $100 a barrel, investor confidence would take a hit.

• 如果伊朗核问题进一步升温，那么霍尔木兹海峡窘迫的形势将继续保持，原油降格将飙升至每桶100美元，投资者的信心也将会遭受重重一击。