Banks Slash Oil Price Forecasts Following U.S.-Iran Breakthrough

Goldman Sachs and Morgan Stanley have slashed their long-term oil price forecasts in the wake of a U.S.-Iran agreement to ease tensions in the Strait of Hormuz, according to multiple financial institutions and market reports. The revisions, announced June 15–16, reflect concerns over a potential surge in Iranian crude supply and weakening global demand growth, with Goldman Sachs cutting its 2027 Brent crude forecast by $10–$15 per barrel from prior estimates.

Goldman Sachs lowered its 2027 Brent crude price forecast to $75 per barrel from its previous projection of $85–$90, citing accelerated Iranian oil exports through the Strait of Hormuz as a key factor. The bank’s analysts, led by Damien Courvalin, warned that even modest increases in Iranian supply could flood markets, pressuring prices amid signs of slowing Chinese demand and a potential economic slowdown in India.

Morgan Stanley followed with its own downgrade, trimming its 2027 Brent forecast to $78 per barrel from $88, while Citi analysts reduced their 2027 outlook to $80 from $92. The moves mark a sharp shift from earlier this year, when most banks had anticipated tighter markets due to OPEC+ production cuts and geopolitical risks in the Red Sea. The Strait of Hormuz, through which roughly 20% of global oil trade flows, has become the focal point of the revision, with Iran signaling it will resume pre-sanctions export levels if sanctions are lifted.

Why are banks cutting forecasts now?
The revisions stem from two verified developments: the June 14 U.S.-Iran framework agreement, which outlines a path to sanctions relief, and Iran’s stated intent to restore 1.5 million barrels per day (bpd) of crude exports—nearly triple current levels. Goldman Sachs’ Courvalin noted in a client note that Iran’s return to full production would add 1.2–1.5 million bpd to global supply by 2027, offsetting OPEC+ cuts and weakening price support.

Market analysts also point to demand risks as a secondary factor. China’s economic slowdown—highlighted in May’s 5.3% GDP growth (down from 5.9% in 2025)—and India’s monsoon-related fuel demand volatility have reduced expectations for consumption growth. "The market had priced in a supply deficit, but now we’re looking at a surplus scenario," said a Morgan Stanley strategist in a June 16 research report.

How do the cuts compare to earlier projections?
The downgrades contrast sharply with forecasts from just three months ago, when Goldman Sachs and Morgan Stanley had projected 2027 Brent prices between $85 and $95. Citi’s prior estimate of $92 was among the highest, reflecting assumptions that OPEC+ would extend cuts beyond 2026. The shift underscores how quickly geopolitical developments can reshape market expectations.

A June 15 Bloomberg analysis of trading desks found that 60% of oil traders had already adjusted their models to account for Iranian supply, with some hedge funds reducing positions in long-dated Brent futures. The International Energy Agency (IEA) echoed the sentiment in its June 14 Oil Market Report, warning that Iran’s re-entry could create a supply overhang of 500,000–700,000 bpd by early 2027.

What happens next for oil prices?
Short-term prices have shown limited reaction, with Brent crude trading at $79.80 per barrel on June 16—down 1.2% from the week’s high but unchanged from pre-forecast levels. Analysts attribute the muted move to traders focusing on OPEC+ meetings in July, where Saudi Arabia and Russia are expected to discuss further production adjustments.

Longer-term, the revisions suggest a bearish bias for 2027–2028, with Goldman Sachs now forecasting $70 Brent by 2028—down from $80. The bank’s Courvalin cautioned that if Iran delivers on its export targets and demand weakens further, prices could test $65 by late 2027. "The risk is not just supply growth, but the speed of it," he stated in the note.

For refiners and traders, the outlook presents a double-edged sword: lower prices reduce input costs but also squeeze margins if demand stalls. The Strait of Hormuz remains the wild card, with Iran’s National Iranian Oil Company (NIOC) confirming in a June 15 statement that it will prioritize exports to Asia once sanctions are fully lifted.

Key takeaway
Banks’ oil price cuts reflect a convergence of supply and demand risks tied to the U.S.-Iran deal and global economic trends. While the Strait of Hormuz agreement reduces near-term geopolitical tensions, it introduces a new supply overhang that could pressure prices below previous expectations. Traders and policymakers will now watch Iran’s export ramp-up timeline, OPEC+ policy shifts, and China’s economic data for further signals.