Two-year Treasury yields have fallen 18 basis points to 3.62% since the U.S.-Iran truce stripped the crude-supply risk premium out of inflation expectations, with Brent down 27% from its wartime peak. Fed funds futures now price a 74% chance of a quarter-point cut in October, up from 51% a month ago.
Traders are paying up for the shortest maturities on the U.S. curve, driving two-year yields down 18 basis points to 3.62% after the U.S.-Iran truce drained the crude-supply risk premium that had been feeding straight into inflation expectations. Deutsche Bank global macro vice chair Ozan Tarman told CNBC's "Squawk Box" on Sept. 22 that the move reflects a mechanical repricing rather than a change in the growth outlook.
"The short end of rates is loving every minute of the oil truce," Tarman said. "When you take a war premium out of crude, you take it out of breakevens, and the front end is where that gets expressed fastest."
Brent crude has fallen to $68.40 a barrel from a wartime peak of $94.10, a 27% decline, while WTI sits at $64.85. Two-year inflation breakevens have compressed to 2.18% from 2.61% over the same stretch, and the 10-year yield has eased 11 basis points to 4.05% — a 43-basis-point gap between the two maturities that is close to the flattest the curve has been since the Fed began cutting. Fed funds futures now assign a 74% probability to a quarter-point reduction at the October meeting, up from 51% a month ago, according to CME FedWatch data.
The transmission is straightforward. Crude is the single largest volatile input into headline inflation, and a 27% drop in Brent feeds through to gasoline and freight costs within roughly six weeks. That gives the Federal Reserve room to look through the energy-driven inflation prints that had kept the committee cautious through the summer. The fed funds rate has sat at 3.75-4.00% since the 25-basis-point cut in July, and officials have declined to pre-commit to a path.
The last time front-end yields fell this fast on an energy shock was in the fourth quarter of 2023, when Brent slid from $95 to $78 after the Israel-Hamas conflict failed to widen into a regional supply disruption. Two-year yields dropped 62 basis points over the following ten weeks, and the S&P 500 gained 9.4% in that window. The current move is roughly a third of that magnitude, which suggests positioning has room to extend if the truce holds.
That "if" is doing a lot of work. The truce is a political arrangement, not a supply agreement, and the Strait of Hormuz still carries about 21% of global seaborne oil. A breakdown would restore the risk premium within days and reverse the front-end bid just as quickly. Options markets are already pricing that possibility: one-month implied volatility on Brent futures sits at 38%, above its 12-month average of 31%.
The second variable is the Fed itself. Chair Kevin Warsh has said he prefers to avoid detailed forward guidance, which means each data release carries more weight than it did under his predecessor. Attention now turns to speeches from several policymakers this week and to the September employment report, which will be the first clean read on the labor market since the truce took effect. If payrolls come in below the roughly 90,000 monthly breakeven pace estimated by the Atlanta Fed, the front end extends its rally. If they beat, the 18-basis-point move unwinds fast.
The third thread is trade. Chinese President Xi Jinping is expected to visit the U.S. and meet with President Donald Trump on Thursday, with semiconductor export restrictions and the AI development race on the agenda. Technology accounts for about 38% of the S&P 500 and has gained more than 20% in 2026, though it has lost ground since early June. A constructive summit would add to the risk-on tone that lower front-end yields have already encouraged; a breakdown would put the entire rates move back in question.
Positioning data shows the market has already leaned in. Asset managers have added to two-year note futures for four consecutive weeks, and the front end now carries the largest net long positioning of any point on the curve. That is a crowded trade, and crowded trades need the truce to hold and the Fed to deliver. The October meeting is the next hard test, with the employment report and the Trump-Xi summit arriving first.
This article is for informational purposes only and does not constitute investment advice.
