In late 1978, strikes spread across Iran’s oil industry as political unrest escalated. Iran’s crude output fell steeply from above 5 million barrels per day to around 2 million barrels per day, tightening supplies for importers. This disruption helped set the stage for the price surge later called the “second oil shock.”
With markets tightening in late 1978, OPEC agreed to a series of quarterly price increases for 1979 at its December meeting. This formalized higher “official” prices even before the full political break in Iran. The decision signaled that the cartel expected sustained uncertainty and stronger pricing power.
By January 1979, Iran’s oil production had fallen dramatically compared with mid-1978 levels, contributing to shortages and long gasoline lines in the United States. The supply drop was widely cited as the trigger for the 1979 petroleum crisis. Higher crude prices and distribution problems fed broader inflation concerns.
On January 16, 1979, Iran’s Shah left the country as protests and labor unrest weakened his rule. The departure accelerated the political transition and deepened uncertainty about future oil exports. For oil markets, the key issue was whether Iran’s production could be stabilized under a new government.
Ayatollah Ruhollah Khomeini returned to Iran on February 1, 1979, becoming the central figure of the revolution. The new political order brought leadership turnover and operational disruption in the oil sector, including the loss of foreign staff and shifts in export relationships. These changes made Iranian supply less predictable in the short run.
In March 1979, OPEC agreed to raise its benchmark price earlier than planned, reflecting continued market stress and rapidly rising spot prices. The move contributed to a multi-tier pricing environment, where surcharges and different base prices complicated trade. For importing countries, this meant higher costs and more volatile contract negotiations.
At the June 1979 OPEC meeting in Geneva, members agreed to two separate base prices (around $18 and $20 per barrel) and allowed extra charges up to a ceiling. This structure reflected internal disagreements between price “hawks” and “moderates,” while still pushing prices higher overall. The outcome reinforced the sense that the oil market had entered a new, higher-price phase.
On July 15, 1979, U.S. President Jimmy Carter addressed the nation as fuel lines and price spikes intensified public concern. He argued that conservation and reduced oil dependence were central to economic stability. The speech reflected how the oil shock had moved from a market event to a major domestic political issue in key importing countries.
On November 4, 1979, Iranian students seized the U.S. Embassy in Tehran, beginning a 444-day hostage crisis. The event sharply worsened U.S.–Iran relations and added political risk to oil trade and shipping decisions tied to the Persian Gulf. It also reinforced expectations that Iranian oil output and exports could remain unstable.
In December 1979, OPEC ministers argued over new price proposals, with competing targets ranging roughly from the mid-$20s to $30 per barrel. The dispute showed that even as revenues rose, the cartel faced internal tension about how far and how fast to push prices. This uncertainty added to market volatility and stockpiling behavior among importers.
On September 22, 1980, Iraq invaded Iran, starting a war that disrupted oil facilities and exports in both countries. The conflict compounded the earlier revolution-driven supply problems and intensified the second oil shock. Reduced output from two major producers raised fears about broader Persian Gulf instability.
On January 28, 1981, President Ronald Reagan issued an executive order ending federal price and allocation controls on crude oil and refined products. The policy shift aimed to let market prices guide supply and investment after a decade of crises and shortages. It marked a major change in how a leading oil-consuming country responded to the 1978–1981 shock era.
Iranian Revolution and the Second Oil Shock (1978–1981)