Iran has threatened to attack any oil tanker passing through the Strait of Hormuz, through which 20% of the world’s oil transits. US oil futures rose 18% to about $108 a barrel, their highest level since July 19, 2022. Brent futures, the global benchmark, increased 16%, near $108 a barrel. Surging oil prices have weighed heavily on stocks in recent days, as traders fear that a prolonged spike in fuel prices could lead to another spike in inflation and hurt the economy. Dow futures dropped more than 800 points, or 1.7%. S&P 500 and Nasdaq futures fell 1.6%. Triggered by...