Oil markets are on edge this week as traders try to anticipate impacts on oil supplies from a potential major retaliation on Iran by Israel.

WTI futures traded around $73.94 per barrel, as of 9 a.m. ET. That’s an increase of 3.37% in the last 24 hours.

As the conflict across the Middle East widens, rising oil prices are being closely watched. The cost of oil affects everything from the price of food at the supermarket to how much it costs to fill up your car. The price of crude oil has risen almost 10% this week to around $78 a barrel as the conflict has intensified.