The Evidence Pack: IEA Data Shows Global Oil Supply Remains 9.4 Million Barrels Below Pre-War Baseline

The global energy market is experiencing a historic, yet highly fragile, recalibration. According to the International Energy Agency's (IEA) July 2026 Oil Market Report, global oil supply posted its largest monthly increase in months during June, driven by the partial reopening of the Strait of Hormuz.[1][2]

The headline data point reveals a sharp rebound: global oil supply jumped by 4.1 million barrels per day (bpd) in June to reach 98.8 million bpd. This surge followed a mid-June ceasefire agreement between Washington and Tehran, which allowed tankers that had been stranded in the Persian Gulf to finally exit the region.[1]

However, the core claim of the IEA's evidence pack is that the market remains deeply depressed compared to its historical baseline. Despite the massive monthly increase, total global output remains 9.4 million bpd below the levels recorded before the US-Israel-Iran conflict disrupted Middle Eastern logistics.[1][2][4]

The mechanism of the June recovery highlights the sheer volume of pent-up supply. With the United States temporarily easing restrictions on Iranian exports and providing security support for non-Iranian shipping, total Gulf oil exports surged by 6.5 million bpd to 16.1 million bpd. Yet, this remains well below the roughly 24 million bpd average exported before the war began.[1][4]

A secondary claim emerging from the data is that the supply crisis has bifurcated, shifting from a crude extraction problem to a refining bottleneck. The IEA data shows that crude and condensate exports accounted for 85% of the monthly increase, while refinery activity has been much slower to respond.[1]

Middle Eastern export refineries have yet to fully restart operations, and ongoing Ukrainian strikes continue to constrain Russian refining capacity. As a result, the global market is currently characterized by a wave of crude oil hitting the water, but a persistent lack of sufficient diesel, gasoline, and jet fuel.[1][4]

This mismatch has pushed refined product "cracks" and refinery margins to four-year highs in early July. Even as increased crude supplies pushed benchmark oil prices lower during June, the cost of the actual fuels used by consumers and freight companies remained stubbornly high.[1][4]

The geopolitical shock has also fundamentally altered global consumption patterns. The IEA projects that global oil demand will decline by 1 million bpd year-on-year in 2026, marking the first annual contraction since the 2020 pandemic lockdowns.[1][2]

Demand hit a low of 97.9 million bpd in May, driven down by elevated fuel prices, a harsher macroeconomic climate, and the sheer lack of product availability across Asia and Europe. While consumption is expected to recover steadily through the second half of the year, the annual contraction is already locked in.[1][4]

To buffer the ongoing deficit, the market has seen a massive shift in where oil is stored. Global observed oil inventories rose by 21 million barrels in June, marking the first increase in four months.[1][4]

This increase was entirely driven by a 117 million barrel surge in "oil on water"—crude currently in transit aboard tanker ships. This floating inventory masked continued heavy drawdowns from onshore commercial tanks and government strategic reserves across OECD nations.[1][4]

Looking ahead, the IEA's baseline forecast projects a massive 7.5 million bpd supply expansion in 2027, potentially flipping the market into a 4.62 million bpd surplus. This would provide a critical opportunity to replenish depleted commercial and strategic inventories.[1][3]

However, the agency transparently notes the high uncertainty surrounding this projection. The entire 2027 surplus forecast is contingent on a lasting peace agreement and the continued normalization of transit through the Strait of Hormuz.[1][3]

Renewed exchanges of fire in the Gulf on July 7-8 have already prompted the IEA to warn that the outlook is clouded. If shipping companies are forced to halt transits again, the anticipated surplus could easily be upended, leaving the global economy to navigate a prolonged period of energy scarcity.[1][3][4]