Global markets have been hit by a fresh energy shock. Brent crude climbed close to $110 a barrel on Thursday before easing toward roughly $106 on the morning of September 11. Even after that pullback, oil remains near its highest level in months and around 50% more expensive than when the Iran war began.
The sharp rise in energy costs quickly spread beyond the oil market. Investors sold government bonds, demanding higher yields to compensate for the risk of renewed inflation. Major U.S. equity indexes ended a fourth consecutive session lower, with the S&P 500 losing about 0.6%.
The yield on the 10-year U.S. Treasury rose to nearly 5%, a level the market has not seen in years. For the broader economy, that is far from an abstract figure: it influences mortgages, corporate borrowing and the cost of servicing public debt, gradually raising the price of money throughout the system.
Daycom’s preliminary analysis of open and verified data indicates that the current market stress has two sources. The war is restricting the physical supply of energy, while higher oil prices are reviving inflationary pressure just as central banks had hoped to move beyond the cycle of elevated interest rates.
The European Central Bank has already responded. On September 10, it raised its three key interest rates by 25 basis points, citing persistent inflationary pressure linked to the Middle East conflict. It was the second increase since the war began and a signal that the energy shock is reshaping monetary-policy plans.
In the United States, the next move by the Federal Reserve has become the central question. Markets are awaiting August consumer-price data, which could shape the tone of next week’s Fed meeting. After jumps in producer prices and oil, traders sharply increased the probability of another interest-rate increase.
The effects are already visible in housing. The average rate on a 30-year fixed mortgage climbed to 6.76%, the highest in more than a year. Existing-home sales fell 2% in August from July as more expensive financing placed increasing pressure on potential buyers.
The biggest source of oil-market risk remains maritime transport. Before the war, roughly one-fifth of the world’s oil supply and a significant share of liquefied natural gas passed through the Strait of Hormuz. Shipping there is now running at only a small fraction of normal prewar levels.
Only about 12 vessels passed through the Strait of Hormuz on Wednesday, compared with more than 130 a day before the war. That collapse in traffic means the problem is no longer limited to insurance or freight costs. Large volumes of physical energy supply simply cannot move along their usual route.
Saudi Arabia has tried to compensate by redirecting part of its exports toward the Red Sea. Oil has been moved west through pipelines and then shipped through the Suez Canal. That route is longer and more expensive, but after severe disruption in Hormuz it remained one of the kingdom’s few viable alternatives.
Now that bypass is under pressure as well. Yemen’s Houthis have seized the strategic port city of Mocha near the Bab al-Mandab Strait. Their advance increases risks for shipping at the southern entrance to the Red Sea, precisely where vessels must pass on the route toward the Suez Canal.
Bab al-Mandab has long been one of the most important maritime chokepoints in global trade. Roughly 12% of world commerce passes through it. With Hormuz already severely constrained, its importance to the oil market has only increased, helping explain why escalation in Yemen quickly moved crude prices.
Saudi Arabia is already feeling the consequences. Its oil exports fell in August to their lowest level in at least 13 years. The kingdom is effectively squeezed between two dangerous routes: Iran poses risks in the Persian Gulf, while the Houthis are exerting growing pressure on Red Sea shipping.
For consumers, the geopolitics is already turning into ordinary household costs. The average U.S. gasoline price has risen to about $4.27 a gallon, while diesel is close to $5.98. Fuel is now dramatically more expensive than when the war began, raising transportation costs across the economy.
Diesel matters especially because it powers trucks, agricultural machinery and a large share of commercial transport. Higher diesel costs therefore filter into food, delivery and industrial-goods prices. The energy shock is beginning to function like a broad new tax on consumption.
That is exactly what bond markets fear most. If expensive energy keeps inflation elevated, central banks may have to maintain high rates for longer or raise them again. In that scenario, older bonds fall in price, yields rise, and equities become less attractive relative to lower-risk government securities.
Companies whose valuations depend on cheap money and profits far in the future are particularly exposed. Higher government-bond yields raise discount rates for technology and other richly valued stocks. At the same time, businesses face more expensive credit while consumers cut spending because of fuel and mortgage costs.
Political uncertainty remains at the center of the market story. There are still few signs that traffic through Hormuz will normalize soon, while the Houthi advance has created a second major threat on the other side of the Arabian Peninsula. Investors must now price in disruption at two critical maritime corridors at once.
Brent’s morning retreat after nearly reaching $110 shows that markets have not yet entered uncontrolled panic. But the speed of recent moves reveals how nervous investors have become: a single report about a tanker, port, strait or negotiation can reshape expectations for global supply within hours.
The next major test will be U.S. inflation data. If the figures confirm persistent price pressure, the oil shock could finally erase expectations of a quick easing cycle from the Federal Reserve. In that case, the Middle East war will increasingly determine not only the price of a barrel, but the cost of money across the global economy.
