"Uncertainty is being driven through the roof," says Scotiabank economist
Birol says impact is already worse the two oil shocks of the 1970s combined
Trump announces productive talks with Iran, which the regime denies
U.S. markets also drop amid risk-off moves
Inflation worries reduce hopes for Fed cut this year
Uncertainty from the war has led to manic back-and-forth swings in oil, stock markets
With fuel prices likely to stoke inflation, projected rate cut less certain this year
Transport and fertilizer cost increases to hit prices for goods, food
Firms with big fuel bills, Nvidia, trade higher
Investors sift through "ugly" jobs report in Canada, U.S. economic data