Billion-Barrel Hormuz Oil Shock Threatens Global Demand — Harvard Economist Ken Rogoff Warns of Iran, Oil & Global Economy at Risk

The closure of the Strait of Hormuz, through which approximately 20% of the world’s oil supply flows, has triggered a significant disruption in global oil markets, with analysts warning that demand destruction is now becoming unavoidable as stockpiles dwindle and the economic impact spreads beyond energy sectors.

According to traders and economists monitoring the situation, the ongoing closure—now in its ninth week as of late March 2026—has already removed a volume of oil equivalent to more than a billion barrels from global supply, far exceeding the emergency inventories released by governments at the start of the conflict.

Saad Rahim, chief economist of trader Trafigura Group, stated that demand destruction is already occurring in less visible sectors such as petrochemical plants in Asia and the Middle East, as well as in shipments of liquefied petroleum gas, a vital cooking fuel in India, and that this adjustment must grow larger if the strait remains shut.

Traders are now sounding the alarm that a sharper demand correction is imminent, as the world’s wealthier economies have thus far relied on drawing from strategic stocks and paying premiums to secure supply, but this buffer is being depleted rapidly.

With global consumption needing to recalibrate downward by at least 10% to align with the reduced supply, experts warn that the adjustment will either come through unaffordable prices forcing consumers to cut back or through government intervention to mandate reduced usage.

The disruption is no longer confined to energy markets. It’s rippling through diverse industries and impacting consumer markets worldwide, as higher energy costs begin to filter into broader economic activity.

Harvard economist Ken Rogoff has highlighted the broader risks to the global economy, noting that the combination of geopolitical conflict and energy supply shock poses a serious threat to growth and stability, particularly if the closure persists.

As the U.S.-Israel conflict with Iran enters its third week, the full economic consequences of a prolonged Strait of Hormuz closure remain uncertain, but the early signs point to a fundamental shift in global oil dynamics, with demand destruction emerging as the inevitable counterbalance to constrained supply.