Traders work on the floor of the New York Stock Exchange (NYSE) on September 15, 2026 in New York City, USA.
Gina Moon | Reuters
On Tuesday, the 10-year Treasury yield hit its highest level since 2007, potentially deepening borrowing costs and exposing the weakest parts of the financial system.
The question for investors, industry veterans say, is not whether yields above 5% will immediately cause something to fail, but where the distortions will occur if interest rates remain at that level.
Market experts agreed that benchmark yields above 5% will gradually expose vulnerabilities as borrowing costs rise for residential, commercial real estate and heavily indebted companies.
The biggest danger arises if interest rates continue to rise long enough to force borrowers who took out cheap debt in the era of zero interest rates to refinance at significantly higher costs.
“Keep in mind that 5% doesn’t mean anything on that day. 5% will ruin your situation 12 to 18 months later when you have to refinance at a new rate,” said Jack Ablin, chief investment officer at Cresset Capital. “The risk is not at the level we are seeing this morning, but the longer we stay here, the more difficult things could become.”
The housing feels first
Housing is probably among the most vulnerable. As long-term Treasury yields soar, mortgage rates are nearing levels that could further erode affordability.
“It’s probably going to show up first in housing,” Ablin said. He said existing homeowners with mortgages around 3% are unlikely to sell because 30-year mortgage rates could approach 8%.
So the first blow may not be a wave of defaults, but a deepening of trading freezes that could hit home builders, mortgage originators, title insurers, brokers and home improvement retailers.
Molly Brooks, U.S. interest rate strategist at TD Securities, also noted that housing is particularly sensitive because rising long-term Treasury yields directly affect mortgage rates.
Meanwhile, Leong said banks could feel pressure later on if real estate and corporate borrowers’ conditions worsen due to long-term high-interest borrowing costs.
Brooks said the steepness of the yield curve could initially support lenders’ margins, as banks typically raise money at short-term rates and lend at higher rates on the outside of the curve.
refinanced watch
Debt financed when interest rates were much lower comes due, potentially creating severe credit stress among businesses and property owners.
“The key issue isn’t necessarily today’s yield levels, but the fact that bonds raised at 2% to 3% now often need to be refinanced at closer to 6% to 8%,” said Billy Leon, investment strategist at Global XETF. “That puts pressure on cash flow, asset values and credit quality.”
Many companies delayed the impact of rising interest rates by extending debt maturities in 2020 and 2021 or further deferring payments thereafter. But “the important point is that the maturity barrier has not been removed, it has been moved,” Ablin said.
Mr Ablin said he was watching for signs of strain in private credit, including an increase in interest coverage ratios on leveraged loans and the proportion of borrowers paying interest on additional debt rather than cash.
Leung highlighted leveraged loans, speculative-grade credit, private equity-backed companies, and commercial real estate borrowers as particularly sensitive to rising financing costs.
Commercial real estate may face particularly severe pressure. Ablin pointed to existing vulnerabilities in office properties and said rising rates could make the problem worse. Higher borrowing costs increase the cost of financing real estate.
Ablin also pointed to the vulnerability of multifamily properties financed with variable-rate bridge loans in 2021 and 2022, when borrowing costs were much lower and rent growth expectations were strong.
Length is more important than height
The bigger question for markets, strategists say, is not that the 10-year Treasury yield has topped 5%, but how long it will stay there.
“I think duration is more important than the exact yield level,” Leon said. “Markets can usually absorb temporary increases of more than 5%, but they become much harder to ignore when they last longer than 6-12 months.”
Ablin similarly said that if 5% yields were sustained for two to three quarters, it would become increasingly difficult to avoid refinancing pressures, while rapidly rising interest rates could create other risks by disrupting hedging and forcing investors to reposition.
Brooks emphasized that the composition of rising yields is also important. A sharp rise in term premiums without a corresponding improvement in growth expectations means borrowing costs will rise without stronger economic activity to cushion the blow.
“At this stage, we don’t see the 5% as an immediate systemic threat, but primarily as a valuation adjustment,” Leon said. “But the margin of error is narrowing.”
