Don't look now, but the pain from high energy prices might be about to bite Americans twice.
With no end in sight to the war in Iran and oil prices stuck above $100 a barrel, bond traders worried about inflation have sold off long-term government debt in the U.S. and developed economies in recent days. That has the effect of raising bond yields, including on the benchmark 10-year Treasury note, which rose nearly 24 basis points in the past week to end Friday near 4.6%. The 10-year Treasury yield influences the cost of mortgages, auto loans, credit card rates and other consumer debt.
And this week brought an even starker signal: the yield on the 30-year Treasury bond rose to 5.127% — its highest level since 2007. On Wednesday, the Treasury Department also sold 30-year bonds above 5% for the first time since 2007. For both bonds, this week saw yields jump the most since tariffs roiled global markets in early 2025.
To unpack what's happening at the intersection of geopolitics, energy, and global debt, CNBC reached out to Daleep Singh, vice chair and chief global economist at asset manager PGIM. Singh has seen global energy conflicts up close: as deputy national security adviser under President Joe Biden, he designed that administration's economic effort to cut off Russia's oil revenue. Earlier in his career, Singh ran the New York Federal Reserve Bank's markets desk — a sensitive position that looks directly into the guts of the global financial system.
On Kevin Warsh: "Could Not Be More Important"
Singh's concerns about the bond market begin with the Federal Reserve's new leadership. The Senate confirmed Kevin Warsh as Fed chair this week, replacing Jerome Powell.
Singh told CNBC he is optimistic about the choice. "His intellectual work has been centered on how to sustain the Fed's most important asset, which is its credibility. That could not be more important at a time when the central bank is under political assault. I think he is going to be thoughtful and deliberate about judging the trade-offs that are necessary to preserve the independence of monetary policy, maybe to the detriment of other responsibilities the Fed once held."
On Warsh's experience, Singh said: "It's also super important to have a Fed chair who has been battle-tested. Warsh has been, through the global financial crisis. He was credited by almost everyone as being the eyes and ears of the Fed into Wall Street, and how that was going in terms of transmitting the response to the real economy. People who dismiss him as reflexively partisan are missing a lot of what he brings to the table in terms of working across the aisle." (CNBC)
The Bond Market Time Bomb: "5%-Plus Yields Are Not Sustainable"
Singh's more urgent warning is about the trajectory of Treasury yields — and what happens if the bond-vigilante trade now rippling through markets reaches the United States in full force.
"If this continues, and let's say Treasury yields [on the 10-year note] march to 5% or above, it won't be long before the Treasury secretary says, 'Listen, I have a toolkit as well, and I'm not afraid to use it,'" Singh told CNBC. "The Treasury secretary can shorten the weighted average maturity of our debt issuance, make more aggressive use of the buyback tool, and potentially jawbone the market with the Fed and say we may have to engage in purchases of long-end bonds to align them with long-term fundamentals. In other words, that is financial repression."
Financial repression refers to when the government artificially holds interest rates down, making debt more manageable — at the cost of harming savers and distorting markets.
"I think that's the end game for the bond market, because 5%-plus bond yields are not sustainable for a variety of reasons," Singh said. (CNBC)
"We're On the Cusp of a Bond-Vigilante Trade Right Now"
When CNBC asked how great the risk of the 10-year yield hitting 5% really is in the next couple of months, Singh was direct:
"I think it's probable. We're on the cusp of a bond-vigilante trade right now. It's materializing in the U.K. These moves tend to take on a life of their own, and they don't self-correct until there's a policy response. This is a very savvy U.S. government that understands bond-market dynamics and is well-aware of how to arrest an upward spike in yields. I personally don't think the bond-vigilante trade will be alive very long." (CNBC)
That assessment aligned with Friday's broader market selloff, when government bonds, precious metals and international stocks all sold off simultaneously. Lauren Hyslop, investment manager at Mattioli Woods, described markets confronting some "uncomfortable" truths. "Rising bond yields are once again imposing their will on markets, tightening financial conditions and sapping risk appetite across asset classes," she told CNBC. "Investors are confronting the uncomfortable reality of 'higher for longer' rates in the U.S., as stubborn inflation and surprisingly resilient growth push back any meaningful easing."
The U.K.'s benchmark 10-year gilt yield rose 15 basis points on Friday alone amid mounting political uncertainty — a preview, Singh suggested, of what a full bond-vigilante episode could look like on American shores.
The Root Cause: Iran, Oil, and a Supply Chain Under Siege
The pressure on the bond market traces directly to the Iran war and its effect on energy prices. Oil has risen nearly 60% since the conflict began, and nearly 80% since the start of 2026, according to the U.S. Treasury Borrowing Advisory Committee. The broad commodity index is now above the pandemic-era high set in 2022.
The Federal Reserve, now holding its benchmark interest rate unchanged at 3.50% to 3.75%, has watched PCE inflation accelerate to 3.5% year-over-year in March, driven heavily by energy. Core PCE sits at 3.2%. At its late-April policy meeting, three officials — Cleveland Fed's Beth Hammack, Dallas Fed's Lorie Logan, and Minneapolis Fed's Neel Kashkari — dissented against language suggesting rates could eventually move lower, marking the most divided Fed vote since 1992.
The IEA has described the Iran conflict as the "most severe oil supply shock in history." S&P Global Energy now expects global oil demand to fall by about 5 million barrels a day in the second quarter — the biggest decline in oil demand outside of the pandemic.
Jamie Dimon's Warning, and What Comes Next
Singh is not alone in his concern. JPMorgan CEO Jamie Dimon warned this week that rising government debt levels could trigger a bond market crisis. "The way it's going now, there will be some kind of bond crisis, and then we'll have to deal with it," Dimon said. "The level of things that are adding to the risk column are high, like geopolitics, oil, government deficits. They may go away, but they may not, and we don't know what confluence of events causes the problem."
A bond crisis would likely mean a sudden jump in yields and a breakdown in market liquidity — where investors rush to sell and buyers recede, typically forcing central banks to step in as buyers of last resort. A recent example is the 2022 U.K. gilt crisis, when yields on U.K. government bonds surged and the Bank of England was forced to intervene to stabilize the market.
For American households, the most immediate consequence is already visible: the 10-year Treasury yield's influence on mortgages, auto loans and credit card rates means that every basis-point move higher is a direct hit on consumers. With the 30-year yield now above 5% for the first time in nearly two decades, the double pain Singh warned about — energy costs at the pump and tightening financial conditions at the bank — is no longer a hypothetical.
