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Ten-year Treasury yield stays above 5% through Wall Street's Hormuz rally
Ten-year Treasury yields stayed in the 5.1% range on Sept. 25 while the S&P 500 rose 0.51% on hopes Iran will reopen the Strait of Hormuz. Oil largely drove the bond selloff, so those talks also decide whether 5% holds as the baseline for borrowing costs.
The Investor · Invest desk

What happened
- The S&P 500 rose 0.51% to 7,743.41 on Sept. 25 as all three major U.S. indexes climbed on hopes the Strait of Hormuz will reopen.
- West Texas Intermediate crude for November fell 2.33% to $92.41 a barrel on hopes for progress in U.S.-Iran talks.
- The 10-year Treasury yield traded in the 5.1% range on Sept. 25, a day after touching 5.22%, its highest level since June 2007.
- Reuters reported that Iran offered to reopen the strait in return for a halt to fighting, an end to a port blockade, frozen funds and an oil-sanctions exemption.
- The Wall Street Journal reported that President Trump is skeptical of the talks and is considering renewed airstrikes after the November midterms.
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Why it matters
- decision A borrower choosing between locking in debt near 5% and waiting for a Hormuz deal is betting on how much of the bond selloff oil explains, against AI capital demand, deficits and the Fed.
- exposure If the talks fail, holders of both stocks and bonds lose at once, because the oil price that lifted equities on the 25th is the force the report blames most for rising yields.
- cost Long fixed-rate funding now prices off a 30-year yield in the 5.4% range, with a majority of surveyed professionals expecting it to pass 6% this year.
- contradiction Stocks priced Reuters' account of Iran's offer, while the Journal's report of Trump weighing strikes after the midterms points toward the opposite outcome.
By the source's own account, oil prices drive both the stock rally and the bond selloff. The Seoul Economic Daily attributes the rise in yields largely to the oil spike that followed the renewed U.S.-Iran conflict [11]. Demand for capital to fund AI investment, the federal budget deficit and the Federal Reserve's tightening stance added to it [11]. A Hormuz reopening should therefore pull yields down as well as lift stocks. On the 25th stocks priced some of that hope, but Brent still closed at $104.32 after its drop [4], and the Dow's 0.93% gain was nearly twice the Nasdaq's 0.48% [2][5].
Iran's asking price is high. As Reuters reported it, Foreign Minister Abbas Araghchi's offer trades one concession for four conditions [2], starting with an end to hostilities on every front, Lebanon included, within seven days [8]. Houthi attacks on Saudi Arabia keep supply fears alive whatever Tehran and Washington agree [10].
If a deal holds, oil falls further and the main force behind higher yields weakens. A 10-year back under 5% should follow if oil accounts for most of the move. If the talks collapse along the lines the Journal describes, oil and yields rise together and stocks give back the 25th. Bloomberg's Markets Pulse survey already has 53% of 173 market professionals expecting the 30-year yield above 6% this year [13], about half a point over its 5.501% peak on the 24th [6][3]. The third outcome is that oil falls and yields stay near 5%, because the report's other drivers (AI spending, the deficit, the Fed) have nothing to do with Iran [11].
The report says analysts now describe 5% as the baseline for Treasury yields [16]. I think the third outcome is the one to plan on. Bloomberg's global sovereign index puts the average government bond yield worldwide at 4.04%, the highest since 2000 [12], and the five-year Treasury crossed 5% on the 23rd for the first time since 2007 [7]. Households expect 4.6% inflation over the coming year, according to the University of Michigan's final September survey, which put overall sentiment at 48.1 [15][14]. A 10-year in the 5.1% range pays roughly half a point over that expectation, though over a longer horizon [4].
The counter-thesis comes from the same report. If oil drove most of the selloff, a confirmed reopening should undo much of it. A company that fixed its borrowing plans at 5% would then have locked in rates a deal would have cut. The test is simple: a 10-year closing back below 5% in the week a reopening is confirmed would mean the baseline was mostly an oil price. A treasurer who delays refinancing to wait out Araghchi's seven days is betting on the talks. On the 25th, with the 10-year still above 5.1%, the bond market had not made that bet [5].
What to watch
- Whether Iran's seven-day window produces an end to fighting on all fronts, including Lebanon, the first of its four conditions.
- The November midterms, after which the Journal reports Trump is weighing renewed airstrikes on Iran.
- The University of Michigan's October one-year inflation expectation, set against September's reading and a 10-year near 5.1%.