U.S.-Iran Two-Week Ceasefire Begins, but Key Hurdles Remain

Two clocks are running on Wall Street this week, and neither is keeping clean time. The first tracks a precarious two-week ceasefire between the United States and Iran, agreed April 7-8 and mediated by Pakistan, that has already begun to fracture over Lebanon. The second ticks toward the release of the March 2026 Consumer Price Index, published this morning at 8:30 a.m. Eastern by the Bureau of Labor Statistics, where analysts widely expected to find the Iran war's first full month of energy-price destruction baked into the headline number.

The ceasefire announcement triggered a sharp flight from safe havens: 10-year and 20-year Treasury yields each fell 9 basis points to 4.253% and 4.839%, respectively, while 30-year yields dropped 7 basis points to 4.851%. WTI crude, the U.S. benchmark, tumbled 16.41% to settle at $94.41 per barrel, its largest single-day drop since April 2020, while Brent crude fell 13.29% to $94.75. Both remained well above their pre-war levels of $67 and $73 per barrel, respectively. The VIX, Wall Street's fear gauge, dropped 22% to just above its pre-war level, and the Dow surged 1,325 points, its best session in a year. The S&P 500 gained 2.51% and the Nasdaq rose 2.8%.

That relief proved short-lived. Oil surged back above $100 per barrel on Thursday after Iran limited traffic through the Strait of Hormuz despite the ceasefire, before easing when Prime Minister Benjamin Netanyahu agreed to negotiate with Lebanon. WTI settled at $97.87 per barrel for the session. The whipsaw revealed which clock is actually setting the pace: not the diplomatic calendar, but the Strait of Hormuz, through which a significant share of global oil supply flows and which remains operationally disrupted. Shipping company executives and analysts said uncertainty is still making transit through the strait too risky, even with the ceasefire formally in effect.

The Lebanon dispute sits at the center of the friction. After the April 8 announcement, Israel launched fresh attacks on Lebanon, with Iranian officials and Pakistani mediators insisting Lebanon falls inside the ceasefire's scope. Netanyahu flatly rejected that position, stating he wants direct talks with Beirut on disarming Hezbollah while insisting there is no ceasefire in Lebanon. Iran's Foreign Minister, Abbas Araghchi, warned there will be no negotiations if Israeli operations in Lebanon continue. On April 9, under U.S. pressure, Israel agreed to hold direct talks with the Lebanese government but signaled it will not observe the truce there. Middle East expert Alex Vatanka told TIME that Iran is "gambling" that Trump will pressure Israel into compliance, calling it "a risk because Trump might not want to do that," and warning that Tehran may ultimately have to "abandon Hezbollah," which he described as "very hard" for Iran to do.

On the diplomatic track, the ceasefire framework itself remains murky. Iran rejected Pakistan's original 45-day two-phased proposal, introduced April 5, and substituted its own 10-point plan covering everything from an immediate halt to hostilities to the lifting of U.S. sanctions and reconstruction support. President Trump called it "a workable basis on which to negotiate." Formal talks are expected to open in Islamabad, though Vice President JD Vance noted three separate 10-point proposals are now in circulation, a signal of how much definitional work remains before negotiators even sit down.

Economists forecast the March CPI would show prices rising at a 3.3% annual pace, driven by a projected 10.6% monthly surge in energy costs tied to the Iran conflict, against a core CPI gain of roughly 0.3%. That would mark a sharp reversal from the 2.4% annual rate recorded in January 2026, and push inflation further above the Federal Reserve's 2% target. Analysts widely believe the Fed will keep interest rates unchanged, and with oil trading near $100 a barrel at points this week, investors are increasingly alert to the possibility that geopolitical tensions could prolong inflation pressure just as central bankers were hoping for more convincing progress.

Ed Yardeni of Yardeni Research lowered his U.S. recession probability from 35% to 20% following the ceasefire, but warned that "a two-week pause is not" a resolution and that markets will remain responsive to headline risk. The Center for Strategic and International Studies has framed the stakes starkly, raising the possibility that the ceasefire simply becomes a de facto permanent settlement: no final deal, but the pause holds indefinitely, with a flare-up risk hovering permanently over oil routes and, by extension, over every inflation report the Fed must read before deciding whether to move rates. The uranium enrichment question that collapsed negotiations in February has not gone away, and CSIS analysts see little reason Iran will be more conciliatory now. At least 1,497 people have been killed since the war began on February 28, including 57 health workers, according to Lebanese authorities.

Senator Lindsey Graham, one of the war's strongest Senate backers, said he sees "troubling aspects" of the deal and is "not sold on" it, a posture that reflects how narrow the diplomatic runway actually is. Markets got a ceasefire. They did not get clarity. The March CPI report landing this morning will tell investors which clock has been closer to the truth.