Brent crude oil fell slightly after U.S.-Iran ceasefire proposals but remains at $108.60 per barrel - 50% higher than pre-war levels. Gas prices now exceed $4 per gallon in the U.S. and $1.79 per liter in Canada.

BMO senior economist Sal Guatieri warns oil prices breaching $150 per barrel would trigger serious economic consequences. Gas prices would surge above $6 per gallon, reducing consumer spending by 2% and risking economic downturn.

The current Iran war oil shock represents the largest monthly fuel price increase in four decades. Unlike previous recessions triggered by interest rates, central banks may not respond effectively as rising energy costs drive inflation higher.

CIBC Capital Markets expects reduced discretionary spending due to oil shock pressures. Sustained pump prices may pressure President Trump to negotiate quick war termination. Americans driving gas-fueled vehicles create political pressure beyond military families.

Global asset management projections show three additional months of Iranian conflict could push Brent crude above $200 per barrel - translating to $7 per gallon gasoline prices.