On a Thursday in September, crude oil climbed to heights not seen since May, and Wall Street felt the weight of it almost immediately. Energy costs carry an old and familiar power over economies — they touch the price of nearly everything, from the fuel in a car to the plastic in a package — and when they rise sharply, markets must reckon with what that means for inflation, consumer resilience, and the patience of central banks. This moment sits at a threshold: high enough to matter, not yet high enough to force emergency responses, but watched closely by those who understand how quickly that