Why Rebuilding Global Oil Reserves Will Not Prevent a Major Surplus Next Year
New York, Thursday, 2 July 2026.
Goldman Sachs warns that rebuilding depleted strategic reserves cannot prevent a projected daily oil surplus of 477,000 cubic meters next year as Middle East shipping routes reopen.
Reopening the Strait of Hormuz and the Path to Normalization
The projected supply glut is closely tied to easing geopolitical tensions in the Middle East. In March 2026, a severe regional crisis trapped millions of barrels of daily crude and refined petroleum product flows in the Persian Gulf, prompting governments worldwide to release strategic stockpiles and drawing global inventories down to multi-decade lows [1]. However, by mid-June 2026, the United States and Iran signed a memorandum of understanding to negotiate a peace deal, signaling a significant shift toward the normalization of maritime traffic through the critical Strait of Hormuz [1].
The Limits of Strategic Stockpile Rebuilding
While the reopening of this vital chokepoint is expected to accelerate global oil supply, many nations are simultaneously preparing to replenish their heavily depleted reserves [1]. In the United States, the Strategic Petroleum Reserve has fallen to its lowest level since 1983, and inventories at the key delivery hub in Cushing, Oklahoma, have crumbled to operational-stress levels [1]. Additionally, several countries in the Asia-Pacific region are seeking to build new reserve capacity to safeguard their energy security against future disruptions [1].
Quantifying the Impending 2027 Market Surplus
Despite these massive reserve-building efforts, Wall Street analysts warn that the incoming supply will easily overwhelm demand. In an interview on Wednesday, July 1, 2026, Samantha Dart, co-head of global commodities research at Goldman Sachs, projected that the global oil surplus will reach approximately 3,000,000 barrels per day in 2027 [1]. While global strategic petroleum reserve rebuilding is expected to absorb slightly over 1,000,000 barrels per day, this effort will only account for approximately 33.333 percent of the total surplus, leaving a substantial net market surplus of 2.000 million barrels per day [1].
Broad Economic Implications and Price Adjustments
This bearish outlook is shared by other major financial institutions and international agencies. On June 30, 2026, the International Energy Agency released an outlook warning that global oil markets could face a significant supply surplus by 2027 as production growth outpaces demand [2]. In response to these shifting dynamics, Morgan Stanley has already slashed its oil price forecasts for the next 18 months, anticipating that the rapid return of crude flows will accelerate the market glut [1]. For corporate executives and policymakers, this transition from the supply constraints of early 2026 to a highly liquid, buyer-friendly market by 2027 signals a potential cooling of global energy-driven inflation [1][2][GPT].