President Trump has renewed his maximum-pressure campaign aimed at curbing Iran’s oil exports, but the market so far has reacted only modestly. The muted response underscores how global oil dynamics have evolved since Trump’s first term.
Under the previous round of sanctions in 2020, Iranian exports fell to roughly 150,000 barrels per day (bpd). During the Biden administration, however, exports recovered to about 1.6 million bpd. Much of that rebound has been driven by sales to smaller Chinese “teapot” refineries and by a sophisticated sanctions-evasion network that relies on hundreds of unregistered or “ghost” tankers.
Several factors explain why markets have not tightened sharply in reaction to the renewed U.S. pressure. First, OPEC+ has the capacity and the political will to increase output and offset potential losses from Iran. Second, U.S. crude production has surged to record levels, surpassing 13 million bpd, which adds significant supply resilience. Third, overall demand conditions remain relatively soft, leaving slack in global inventories that can absorb disruptions without large price spikes.
Analysts at StoneX estimate that renewed sanctions could remove roughly 400,000 bpd of Iranian exports from global markets. Yet whether Washington can achieve that outcome depends on the administration’s willingness to press China, which has been a major buyer of Iranian crude, and on its ability to dismantle the networks that enable shadow-fleet operations—such as ship-to-ship transfers, use of false documentation, and supporting logistics onshore.
Targeting those enforcement gaps is complex. The “ghost” tanker fleet operates through shell companies, frequent reflagging, and opaque ownership structures that make tracking and sanctioning individual vessels difficult. Disrupting this system would require sustained diplomatic pressure, coordinated maritime monitoring, and targeted penalties that reach intermediaries and financiers, not just the tankers themselves.
Even with stronger enforcement, the global market’s ability to adapt remains a key constraint on how much influence sanctions can exert on prices. Producers within OPEC+ can smooth shocks by adjusting output, while high U.S. production provides an additional buffer. On the demand side, slower economic growth or efficiency gains can further limit price upside.
In short, while renewed U.S. sanctions could reduce Iranian crude flowing to market, the likely impact on global prices will depend on a mix of enforcement effectiveness, Chinese cooperation, and how other major suppliers respond. For policymakers and market participants, the evolving interplay between diplomatic action and market adaptability will determine whether renewed pressure on Iran translates into meaningful shifts in supply or only modest market reactions.