This marks the largest coordinated stock release since the IEA’s establishment in 1974—more than double the volume released following the 2022 Russia–Ukraine conflict. Initially, oil prices dropped by $3 per barrel on the news. However, the decline lasted less than an hour. By the close, Brent crude had risen 4.8% to $91.98, while WTI climbed 4.6% to $87.25. In early Asian trading on March 12, WTI surged past $90, briefly topping $94.

Why did the largest strategic release in history result in only a “technical pullback”?

Markets Trade “Daily Flow,” Not “Total Inventory”

The 400 million barrels will not enter the market all at once. They will be released in batches over several months. Rebecca Babin, senior energy trader at CIBC, noted that logistical constraints—auctions, shipping, and transportation—limit the actual release pace to around 1.2 million barrels per day.

By contrast, JPMorgan estimates that near-total disruption in the Strait of Hormuz has removed between 11 million and 16 million barrels per day from global supply. Even at maximum theoretical speed, the IEA release would offset only about 10% of the shortfall.

Time is an even more critical variable. Michael Lynch, president of Strategic Energy & Economic Research, estimates that since the conflict began on February 28, approximately 175 million barrels of supply have already been lost. As storage facilities fill up, production shut-ins are expanding—currently at least 5 million barrels per day and potentially rising to 8–10 million barrels. The 400 million barrels of reserves would “cover barely more than three weeks of war-level disruption.”

Release Speed Is the Key Price Driver

Beyond physical bottlenecks, several structural constraints limit how quickly total reserves can be converted into usable market supply:

First: National Implementation Differences
While the IEA agreed to release reserves, execution rests with individual member states. Storage locations, transportation infrastructure, and legal procedures vary widely, creating significant coordination challenges. Historically, coordinated releases tend to start slowly before accelerating.

Second: Commercial Storage Constraints
Once released, crude oil must be received by commercial storage facilities, processed by refineries, and transported via pipelines. With global commercial inventories already low, receiving capacity itself has become a bottleneck.

Third: Crude Quality Mismatch
Strategic reserves may not perfectly match refinery requirements. Factors such as API gravity, sulfur content, and acidity determine whether reserve crude can be efficiently processed and at what economic value.

Given these constraints, markets are pricing in release speed more than total volume. Goldman Sachs offers a relatively moderate outlook, estimating that if Persian Gulf exports decline by 15 million barrels per day for 60 days, oil prices would stabilize between $89 and $93. The U.S. Energy Information Administration (EIA) presents a more dynamic forecast: Brent crude may remain above $95 over the next two months before easing toward $70 by year-end—depending largely on the duration of the conflict and resulting production losses.

Delivery Lag Adds Risk Premium

According to the U.S. Department of Energy, it takes roughly 13 days from the decision to release strategic reserves to the point when oil reaches the market. On March 11, former President Donald Trump indicated the U.S. would “slightly” reduce reserves to curb prices. The following day, U.S. Energy Secretary Wright announced that 172 million barrels would be released starting next week, with deliveries expected to take up to 120 days.

In peacetime, a 13-day lag is merely logistical. In wartime, it represents significant exposure to risk.

On March 11, a spokesperson for Iran’s Khatam al-Anbiya Central Headquarters warned that vessels belonging to the United States, Israel, and their partners would be considered “legitimate targets.” Iran also stated that its military strategy had shifted from “proportional retaliation” to “continuous strikes,” abandoning a one-for-one response approach.

The same day, maritime security firms reported three additional vessels struck by artillery fire in the Strait of Hormuz. Since the conflict began, at least 14 ships have reportedly been attacked in the region. ADNOC’s Ruwais refinery in Abu Dhabi was forced to shut down following a drone-induced fire. A desalination plant in Bahrain was also hit by a drone strike.

In other words, while strategic reserves are still in transit, new tankers may be burning, refineries may be shutting down, and additional supply losses may be unfolding. Markets inevitably incorporate this time gap into the geopolitical risk premium.

Natasha Kaneva, head of global commodities research at JPMorgan, summed it up: unless safe passage through the Strait of Hormuz is restored, policy tools will have limited impact on oil prices.

Conclusion

In the face of supply shocks, markets do not trade total inventory—they trade daily flow. Oil prices are determined not by the announcement of a release, but by when barrels actually arrive. $90 per barrel may not be the ceiling. As long as tankers remain hesitant to sail through the strait and Iran’s “continuous strike” strategy persists, the next milestone could be $100.