In the summer of 1983, Wall Street had a problem.
Inflation was finally cooling after years of punishing price increases. But Washington was running huge deficits, and bond investors worried all that borrowing could eventually reignite inflation.
So, they fought back.
Investors sold long-term government bonds and demanded much higher yields before they would lend Washington their money.
My favorite economist, Ed Yardeni, was watching it all unfold. On July 27, 1983, he gave those investors a name that has stuck for more than four decades:
The bond vigilantes.
His point was simple. If politicians and central bankers refused to impose fiscal discipline, bond investors would do it for them by driving borrowing costs higher.
Nine years later, Stanley Druckenmiller and Scott Bessent got a firsthand lesson in just how powerful markets can be.
Both were working for George Soros in 1992 when they helped make the famous bet against the British pound. Britain tried desperately to defend its currency, but the market eventually won. On “Black Wednesday,” the government abandoned the effort, and Soros’ fund made more than $1 billion.
I bring all this up today because the bond vigilantes are back.
The 30-year Treasury yield recently topped 5.3%, its highest level since 2007. Yields have backed off from those highs this week, but they remain stubbornly high.
So, in today’s Market 360, we’ll look at why the bond vigilantes have returned. And since I know bond markets aren’t always the most exciting material to cover, I’ll also explain why it matters for stocks and how it may also be pointing toward an even bigger reset in the AI boom.
Why the Bond Vigilantes Are Back
So, what caused the bond vigilantes to resurface? There are a few factors…
1) Global Bond Yields
First, bond yields have risen around the world, including in the U.K., France, Germany and Japan.
It’s not hard to see why. These countries have aging populations and growing social safety nets. They’ve also been slower to embrace the AI Revolution and ramp up domestic energy production.
Folks, it’s really hard to grow your economy with factors like that.
Here in the U.S., we have our own problem: The national debt recently crossed $40 trillion for the first time.
Still, the U.S. remains an oasis by comparison. We’re leading the AI Revolution, producing more energy than ever and growing faster than many other developed nations.
2) Inflation Worries
Second, there are concerns that elevated energy prices stemming from the conflict with Iran could keep inflation stubbornly high.
If inflation stays elevated, the Federal Reserve has less room to lower interest rates.
But the latest data has been more encouraging. The Consumer Price Index (CPI) rose just 0.1% in July, while the Producer Price Index (PPI) was flat.
Wednesday morning’s Personal Consumption Expenditures (PCE) report gave us a slightly more nuanced read. Monthly inflation was contained, but the year-over-year numbers are still too hot to declare victory (more on that later in Market 360.)
So, inflation remains a concern, but I don’t see anything in the latest reports that has me hitting the panic button.
3) The AI Spending Spree
Third, there are concerns about the massive amount of spending and increasing debt being used to fuel the AI and data center boom.
Amazon.com, Inc. (AMZN), Microsoft Corporation (MSFT), Alphabet Inc. (GOOG) and Meta Platforms, Inc. (META) now plan to spend a combined $725 billion on capital expenditures in 2026 alone, up 77% from last year.
Until recently, much of that spending came from cash flows.
Now, an increasing chunk is being raised in the debt markets.
That means Big Tech is increasingly competing with Uncle Sam for investor dollars. And flooding the market with more corporate debt can help push yields higher across the board.
We’ve already seen investment-grade corporate bond issuance surge this year as some of the biggest AI spenders tap the debt markets to finance new data centers, chips and power infrastructure.
That doesn’t mean the AI boom is running out of steam.
But it does mean Wall Street is becoming much more demanding about where all this money is going and which companies will ultimately earn the best returns from it.
Here’s My Take
So, is it time to panic?
I’ve relied on Ed’s read of the bond market for years. When the man who coined the term has something to say about bond vigilantes, I listen.
Last week, his firm wrote: “We aren’t pushing the panic button.”
So, neither am I.
Yardeni still expects the 10-year Treasury yield to trade in a normal, though slightly elevated, range of about 4% to 5%. And he doesn’t expect that to have any “adverse consequences” for the U.S. economy or corporate earnings.
That’s good news.
The other good news is that the Treasury yield curve is not inverted like it was when Janet Yellen was Treasury secretary and Jerome Powell was running the Fed.
And this brings us back to Bessent and Druckenmiller.
Bessent has been unusually active in trying to calm the bond market.
Earlier this month, the U.S. Treasury Department intervened in the Japanese currency market.
It was the first coordinated U.S.-Japan currency intervention since 1998. The goal was to help Japan stabilize its currency without forcing it to sell some of its massive Treasury holdings, which could have pushed U.S. yields even higher.
Then, last week, the Treasury announced that it will at least double the maximum size of its long-term bond buybacks, from $2 billion to $4 billion per operation. The goal is to improve liquidity at the long end of the market.
And this week, reports emerged that the department is considering using some of the nearly $1 trillion sitting in the Treasury General Account to help fund additional long-term bond purchases.
Here’s the ironic part, folks.
Back in 1992, Bessent and Druckenmiller stood on the same side of the trade, betting that the British government couldn’t overpower the market.
Today, Bessent is the government official trying to keep the bond market orderly. And this week, in Wall Street Journal op-ed, Druckenmiller warned that Bessent should listen to the message investors are sending.
Druckenmiller said the bond market wasn’t sending a message of crisis – but rather an “invoice.”
He cautioned that “the only thing that durably lowers long-term yields: address the primary deficit.”
Bessent, for his part, says the program is simply designed to support liquidity.
I think there’s truth on both sides.
Bessent is right to make sure the world’s most important bond market remains liquid and orderly. But Druckenmiller is also right that no buyback program can magically make concerns about deficits, inflation and soaring debt disappear.
What This Means for Stocks
Now, ultimately, the market will decide all of this.
But here’s what I want you to remember, folks.
Even with elevated yields, we remain in a phenomenal earnings environment. S&P 500 earnings will grow 50% year-over-year in the second quarter, according to FactSet.
So, fundamentally superior stocks remain attractive.
But higher long-term yields do change the math for investors.
When Treasury yields rise, companies have to pay more to borrow. And investors have more attractive alternatives to stocks, which means they can demand better earnings growth and stronger returns before taking on equity risk.
That matters especially for the AI boom.
Big Tech is spending hundreds of billions of dollars on data centers, chips and power infrastructure. As borrowing costs rise, Wall Street will become less forgiving about that spending. Investors will want to see which companies can turn those massive investments into real profits.
And that’s where I think the bond market is giving us an important clue.
I don’t believe AI is running out of steam. But I do believe we’re moving into a phase where capital becomes more selective and the market starts separating yesterday’s AI leaders from the companies positioned for what comes next.
My research team and I believe that shift could coincide with a much bigger reset already taking shape inside the AI industry.
The Next Phase of the AI Boom
I remain extremely bullish on artificial intelligence.
But I don’t expect the companies and technologies that dominated the first phase of this boom to automatically dominate the next one.
My research team and I have spent months studying a massive new AI effort taking shape across America’s national laboratories.
President Trump has compared the broader effort to a new Manhattan Project for AI.
At its center is a new network of government supercomputers and AI infrastructure that I call Golden Dawn.
The goal is to use AI to accelerate scientific breakthroughs in areas ranging from energy and medicine to advanced materials and quantum computing. Project leaders say it could accelerate AI-powered breakthroughs – and I believe the companies helping to build that infrastructure could represent the next major group of AI winners.
That’s why I recently put together a special presentation called The AI Reset of 2026.
In it, I explain what Golden Dawn is, why I believe it could reshape the AI market and which stocks I think are positioned to benefit as this next phase unfolds.
You can click here now to watch the full story for yourself.
Sincerely,
Louis Navellier
Editor, Market 360
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