Global shares are mostly lower in cautious trading as investors watch for what might happen on interest rates and the war with Iran pushes oil prices higher

Oil prices extended gains on Wednesday as escalating tensions between the U.S. and Iran fueled concerns over further disruptions to Middle East energy supplies.

International oil benchmark Brent spiked above $100 a barrel Wednesday for the first time since late July following renewed US-Iran hostilities in the Middle East, stoking fears…