A widening conflict in the Middle East has led to dramatic swings and surges in the price of fuel for ships, prompting distributors in Singapore, the world's top bunkering hub, to cut back their purchases. Photo / Getty ImagesA widening conflict in the Middle East has led to dramatic swings and surges in the price of fuel for ships, prompting distributors in Singapore, the world’s top bunkering hub, to cut back their purchases. Photo / Getty Images

Finance Minister Nicola Willis (inset) says it is important that the Government has been up front about the impact the oil crisis is having on the economy. Photo / New Zealand Herald composite imageFinance Minister Nicola Willis (inset) says it is important that the Government has been up front about the impact the oil crisis is having on the economy. Photo / New Zealand Herald composite image

Budget warning: Economist wary of pending package