Asian shares are mixed and oil prices have climbed further as escalating Iran-Israel tensions threaten to disrupt supplies of crude.

U.S. oil prices already jumped last week, which could cause prices at the pump to rise about 20 cents a gallon in the coming weeks, according to one estimate.

"Never try and predict what the price of oil is going to be, because there's one sure thing: You're going to be wrong," says Baker Hughes CEO Lorenzo Simonelli.