News of the week summary - 12/04/2026

The CPI for March shows the largest monthly petrol price increase since records began

On Friday, the Bureau of Labor Statistics published the Consumer Price Index for March, the first inflation report to capture a full month of the conflict's effect on energy costs. Headline CPI rose 3.3 percent year on year, the highest reading since April 2024 and a sharp acceleration from 2.4 percent in February. The monthly gain of 0.9 percent was the largest since 2022.

The driver was almost entirely petrol. Gasoline prices rose 21.2 percent in a single month, the largest one-month increase in the history of the BLS gasoline series, which dates back to 1967, and alone accounted for close to three-quarters of the total monthly rise in the index. The broader energy index climbed 10.9 percent for the month. Fuel oil rose 30.7 percent. These categories reflect the near-instantaneous transmission of crude oil prices to retail consumers: unlike food or manufactured goods, where supply chains buffer the shock for weeks or months, petrol is repriced daily at the pump based on yesterday's crude price. The war's energy shock arrived at the filling station within days.

Elsewhere in the data, the picture was considerably calmer. Core CPI, which strips out food and energy, rose just 0.2 percent for the month and 2.6 percent over the prior year, essentially unchanged from February. Food prices were flat. Shelter inflation continued its gradual deceleration. Services inflation remained contained. For the Federal Reserve, this split was significant: headline CPI had surged due to a supply shock in a category the central bank cannot influence directly, while the underlying measures of domestically driven inflation were giving no sign of acceleration. The Fed was due to meet again on April 28-29, and markets were already pricing near-certainty of a hold.

The harder question raised by the report was not what the Fed would do in April but what the CPI would look like in May and June. Crude remained elevated even after the ceasefire announcement. Petrol prices above $4 per gallon were now embedded in household budgets, feeding into transportation costs, manufacturing inputs, and the price of anything that moves by road or air. Economists pointed to a meaningful lag before the full effects of an energy shock appear in food and services prices. March's report may have captured the leading edge of a broader repricing still to come.

Islamabad talks collapse; the US announces a naval blockade of Iranian ports

The ceasefire's fragility was exposed on Saturday when marathon peace negotiations in Islamabad ended without agreement. US Vice President JD Vance and an Iranian delegation had met for more than 21 hours across two days of talks mediated by Pakistan, seeking a path toward a lasting settlement that would reopen the Strait of Hormuz. The talks broke down over two core issues: Iran's nuclear enrichment programme and the sequencing of any Hormuz reopening relative to the lifting of sanctions. The two sides departed without a joint statement.

Hours later, the US announced a naval blockade of Iranian ports. The measure was framed as an economic enforcement action, expanding the existing military posture into a more systematic interdiction of Iranian maritime commerce. Oil moved back above $100 per barrel in early Asian trading on Saturday evening, reversing a substantial part of the ceasefire-driven decline. Gold, which had initially surged on the ceasefire announcement as investors sought safe-haven exposure alongside equities, gave back those gains and fell toward $4,750 per ounce.

The sequence of events across the week illustrated a dynamic that is likely to persist for as long as the conflict remains unresolved: large and rapid price movements in both directions in response to diplomatic headlines, with the underlying physical reality (Hormuz still closed, 800 vessels still waiting, supply still curtailed) remaining constant beneath the surface volatility. What changed from day to day was not oil supply, which was no different on Saturday than on Tuesday, but the probability investors assigned to its restoration. The volatility is rational as a response to genuine uncertainty, but it creates a difficult environment for every institution that needs to plan: businesses setting prices, central banks calibrating policy, governments designing fiscal responses.

Delta's first-quarter results offer the first direct read on corporate resilience

Wednesday also brought the first major corporate earnings result to illuminate how companies were absorbing the war's costs. Delta Air Lines reported first-quarter adjusted revenue of $14.2 billion, slightly ahead of the $14.1 billion consensus, with the company's premium cabin business continuing to generate revenue that more than offset the steep increase in jet fuel costs. Management noted that the company had entered the year with its fuel hedging programme in place and that the premium domestic and transatlantic routes serving business and high-income leisure travellers showed no softening in demand.

Delta's result carried a broader signal for the earnings season that was about to begin in earnest. The company had been one of the most exposed large-cap stocks to the war's energy shock, given that jet fuel is both its largest cost and a category where it has limited pricing power in the short term. Its ability to absorb that headwind through stronger revenue in premium segments suggested that the upper end of the consumer economy was, at least in the first quarter, largely insulated from the energy shock. The implications for the S&P 500's first-quarter earnings, which would be reported over the following two weeks, were cautiously positive: much of the damage had come in a category where index companies were not uniformly exposed, and where the companies most affected had already shown they had pricing leverage available.