The Bull Market Is Turning 4 Years Old — But Yields Could Crash the Party

 The Bull Market Is Turning 4 Years Old — But Yields Could Crash the Party

## The Anniversary Nobody Is Celebrating (Yet)

Let me tell you about a birthday that Wall Street should be toasting with champagne.

**On October 12, 2026, the bull market that began in the depths of 2022 turns four years old.**

Since that day, the S&P 500 has surged roughly **83%**, adding approximately **$28 trillion in market value** . It's the **8th longest bull market since World War II** . And it's still going.

**But here's the thing about birthdays:** The older you get, the more people start asking uncomfortable questions. Questions about your health. Your longevity. Whether you've saved enough for retirement.

**The same is true for bull markets.** And right now, the questions are getting louder—because the **bond market is sending a warning signal that's impossible to ignore.**

**The 10-year Treasury yield has broken through 5.2%—its highest level since 2002.** The 30-year yield is above 5.6%. And mortgage rates have hit **7.49%**, the highest since 2023.

**For four years, tech has been the answer to almost every question about this bull market.** But can it keep carrying the weight?

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## The Anniversary: Four Years of AI-Driven Gains

### From the Bottom to the Top

**Frequently Asked Question:** *How did this bull market start?*

**It started in the ashes of 2022.**

On **October 12, 2022**, the S&P 500 bottomed out after a brutal year. Inflation was at 40-year highs. The Fed was hiking rates aggressively. The war in Ukraine had disrupted global energy markets. And the "Magnificent Seven" tech giants had just suffered their worst year since the dot-com crash.

**Then something changed.** The AI revolution began.

**Nvidia's GPUs became the picks and shovels of the AI gold rush.** Microsoft, Google, and Amazon started building massive data centers. And the market realized that artificial intelligence wasn't a fad—it was a **generational shift in how the economy works**.

**The numbers tell the story:**

- **S&P 500 gain:** 83%

- **Market value added:** $28 trillion

- **Duration:** 4 years (and counting)

- **Rank:** 8th longest bull market since WWII 

**The bull market that was supposed to die in 2023 kept running.**

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## The Problem: The Bond Market Is Finally Catching Up

### 24-Year Highs in Yields

**Frequently Asked Question:** *Why are bond yields rising?*

**Three forces are colliding at once:**

**Force #1: Inflation is sticky.** Even after aggressive Fed hikes, core PCE remains above 3%. More than half of the components of core PCE are running above the Fed's 2% target .

**Force #2: Government borrowing is exploding.** The U.S. budget deficit is running at 6-7% of GDP. To fund that deficit, the Treasury must issue **enormous amounts of debt** .

**Force #3: AI capex is competing for capital.** Companies are borrowing hundreds of billions to build data centers. That's **more competition for the same pool of capital** .

**The result:** The **10-year Treasury yield hit 5.35%**—its highest since **April 2002**. The **30-year yield reached 5.73%**—a 24-year high.

### Why This Matters for Stocks

**Frequently Asked Question:** *Why do high bond yields hurt stocks?*

**Three reasons:**

**Reason #1: Higher discount rates.** A dollar of profit earned five years from now is worth **less today** when yields are high. That's especially punishing for **growth stocks**—like tech companies—whose valuations depend on profits far into the future .

**Reason #2: Competition for capital.** If you can earn **5.2% risk-free** from a Treasury bond, why take the risk of owning stocks? Higher yields make **bonds more attractive relative to equities** .

**Reason #3: The equity risk premium is compressing.** Investors are being paid **less** to take on the additional risk of owning stocks instead of risk-free assets. That's a sign of **complacency**—and it makes stocks vulnerable to any negative surprise .

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## The Concentration Problem: A Hollow Tree

### 80% of Stocks Are in a Correction

**Frequently Asked Question:** *Is the rally broad or narrow?*

**Painfully narrow. And it's getting worse.**

**Jeffrey Gundlach**, the "new Bond King" and founder of DoubleLine Capital, compared the current market to a **hollow tree about to snap**:

> **"The market is like a hollow tree... 80% of S&P 500 constituents are at least 10% below their 52-week highs—in correction territory. 39% are down more than 20%—in bear market territory. The S&P 500 is already rotten inside, you just can't see it. You only realize the tree is hollow when the branch comes crashing down."** 

**The numbers back him up:**

- **Only 15 of 504 S&P 500 stocks** hit record highs on Tuesday 

- **The median S&P 500 stock is still 25% below its own high** 

- **The equal-weight S&P 500 is 5.1% below its record** 

**The rally is being carried by a handful of AI giants.** The **"Magnificent Seven"** —Nvidia, Meta, Microsoft, Apple, Amazon, Alphabet, and Tesla—now have a combined market cap of **$24.95 trillion**, just shy of the **$25 trillion** milestone .

**If they stumble, the whole market stumbles with them.**

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## The Tech Exception: Why AI Stocks Are Defying Gravity

### The "Reverse Bond Trade"

**Frequently Asked Question:** *Why are tech stocks rallying when bond yields are rising?*

**Because tech has become the safe haven—the opposite of what textbooks teach.**

**Jay Hatfield**, CEO of Infrastructure Capital Management, explained it perfectly: **"Tech stocks are somewhat like a reverse bond trade. Investors buy tech stocks while selling other stocks. It's almost like an unstoppable powerful force."** 

**Here's the logic:** When the rest of the market looks shaky—small caps, utilities, homebuilders, financials—investors **crowd into the companies with the strongest earnings growth**. And right now, that's AI.

**Nvidia's numbers justify the faith:**

- **Revenue:** $96.2 billion, up **106% year-over-year**

- **Data center revenue:** $89 billion, up **117%**

- **Gross margin:** **75%** sustained despite massive scale-up 

**Meta's Muse AI agent** hit #1 on Apple's App Store within days, ousting ChatGPT. It now has over **3 million weekly users** .

**Microsoft's Azure** grew **43%**, and Copilot surpassed **30 million paid seats** .

**The message:** AI spending is translating into **real revenue**. And as long as that continues, investors will tolerate almost anything—even 5% Treasury yields.

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## The AI Capex Question: Is the Spending Sustainable?

### The $580 Billion Bet

**Frequently Asked Question:** *How much are these companies spending on AI?*

**Staggering amounts.**

**In 2026 so far, the Magnificent Seven plus SpaceX have spent approximately $580 billion on capital expenditures.** That's about **30% of all S&P 500 capex** .

**The market is asking one question:** Will the returns justify the spending?

**UBS warned:** **"The primary risk we see to the market is a meaningful downward shift in expectations for AI capex spending. The AI capex cycle has been a boon to markets and household wealth, so a change in the narrative could undermine markets and potentially weigh on consumer confidence."** 

**The indicators UBS is watching:**

- **AI adoption rates**

- **Token spending**

- **GPU prices**

- **Memory prices**

**"At the moment, these indicators are generally still pointing in a positive direction, but they merit close monitoring."** 

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## The Risks That Could Crash the Party

### Risk #1: A Disorderly Yield Spike

**Frequently Asked Question:** *What's the biggest risk to the bull market?*

**A rapid, disorderly rise in bond yields.**

**J.P. Morgan's research** is clear: **"A gradual rise in yields will eventually tighten financial conditions as much as a rapid one, but with less interim market disruption."** 

**The "taper tantrum" of 2013 is the cautionary tale.** When Bernanke hinted at reducing bond purchases, the 10-year yield moved **50 basis points** and the S&P 500 dropped **5%** in a month .

**Goldman Sachs warned:** **"While bond yields have been rising, the speed of the adjustment is important and could become a trigger for an equity correction. A sharp increase in bond yields from current levels presents an additional meaningful risk for equity investors."** 

### Risk #2: The Fed Turns More Hawkish

**Frequently Asked Question:** *What if the Fed hikes rates again?*

**That's the "bull market killer" scenario.**

**Morgan Stanley's equity team** put it bluntly: **"Bull markets don't die of old age; they get killed by the Fed."** 

**The Fed raised rates in September**—the first hike in three years. Another is expected by December. If inflation stays sticky and the Fed signals more hikes than expected, **the bull market's foundation cracks** .

**The irony:** The Fed is hiking because the economy is strong. But higher rates could **kill the very growth that justifies them**.

### Risk #3: AI Disappointment

**Frequently Asked Question:** *What if AI earnings disappoint?*

**The concentration risk cuts both ways.**

**Goldman Sachs warned:** **"If AI adoption proves slower than expected, or if pricing power among technology leaders disappoints as competition intensifies, earnings forecasts could be revised down sharply."** 

**And because AI stocks are so heavily weighted in the indexes, even a partial reassessment could have broad consequences.** The S&P 500's technology weight has risen from **20% to nearly 40%** over the last decade .

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## The Historical Perspective: Bull Markets Don't Die of Old Age

### What History Says

**Frequently Asked Question:** *Is the bull market too old to continue?*

**History says no.**

**Morgan Stanley's research** found that **"not all bull markets last four years, but if they do, the fourth year has always been a positive year."** 

**The average bull market since 1950 has lasted about 5-6 years** .

**And the current bull market's fourth year is off to a strong start.** The S&P 500 just hit a **record high** on Tuesday—its first since August 13 .

**But here's the caveat:** **2026 is a midterm election year**, and historically, there's a **sizable correction** in midterm years .

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## Frequently Asked Questions

**Q: When did the current bull market begin?**

A: **October 12, 2022.** The S&P 500 bottomed out after a brutal bear market driven by inflation and Fed rate hikes .

**Q: How much has the S&P 500 gained?**

A: Approximately **83%**, adding about **$28 trillion in market value** .

**Q: What's the biggest threat to the bull market?**

A: **Rising bond yields.** The 10-year Treasury yield is above **5.2%**—its highest since 2002. A rapid, disorderly spike could trigger an equity correction .

**Q: Why are tech stocks rallying despite high yields?**

A: Because tech has become the **"reverse bond trade."** Investors are crowding into AI stocks—which have strong earnings growth—while selling more rate-sensitive sectors like small caps, utilities, and homebuilders .

**Q: Is the rally broad or narrow?**

A: **Extremely narrow.** Only **15 of 504 S&P 500 stocks** were at record highs on Tuesday. **80% of stocks are at least 10% below their 52-week highs** .

**Q: How much are tech companies spending on AI?**

A: The Magnificent Seven plus SpaceX have spent approximately **$580 billion on capex in 2026**—about **30% of all S&P 500 capex** .

**Q: Will the bull market survive?**

A: **Morgan Stanley says yes.** Their research shows that if a bull market lasts four years, the fourth year has **always been positive**. But they warn that **2026 is a midterm year**, which historically brings a sizable correction .

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## Conclusion: The Party Isn't Over—But the Music Is Getting Louder

Let me bring this home.

**Four years ago, the bull market was born in the ashes of 2022.** Inflation was raging. The Fed was hiking. The world was dark.

**Today, the S&P 500 is up 83%. $28 trillion in wealth has been created. And AI has become the engine of the global economy.**

**But the party has a problem: the bond market is turning up the music, and it's getting harder to hear each other talk.**

**The 10-year Treasury yield is at 5.2%—a 24-year high.** The 30-year is above 5.6%. Mortgage rates are at 7.49%. And the Fed isn't done hiking.

**For four years, tech has been the answer to every question.** When the economy wobbled, tech delivered earnings. When rates rose, tech absorbed the blow. When investors got scared, tech provided shelter.

**But the concentration is extreme.** Only 15 stocks are at record highs. 80% of the market is in a correction. And the "Magnificent Seven" are carrying the weight of the entire index on their shoulders.

**Goldman Sachs put it plainly:** **"A sharp increase in bond yields from current levels presents an additional meaningful risk for equity investors."** 

**J.P. Morgan added:** **"The sensitivity of equity markets to higher yields has likely increased as the index itself has become more growth-oriented."** 

**So here's the question:** Can the AI trade keep defying gravity? Can Nvidia, Meta, Microsoft, and the rest keep delivering earnings that justify their valuations—even as the cost of capital rises?

**For now, the answer is yes.** The earnings are real. The AI spending is translating into revenue. And investors are still betting on the future.

**But the wall of worry is getting taller. And the bond market is building it, brick by brick.**

**The bull market is four years old. The question is whether it gets to celebrate five.**

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## Disclaimer

**This article is for informational purposes only and does not constitute financial, investment, or trading advice.**

I am not a licensed financial advisor, investment professional, or analyst. The views expressed here are based on publicly available information and my own analysis at the time of writing.

**Key facts cited in this article are sourced from Bloomberg, Morgan Stanley, Goldman Sachs, J.P. Morgan, UBS, Nasdaq, Yahoo Finance, Bespoke Investment Group, and other outlets as of October 10-11, 2026.** Market data is subject to revision. Stock prices, bond yields, and analyst projections change constantly.

**Investing in stocks involves significant risk, including the potential loss of your entire investment.** **Past performance does not guarantee future results.** The bull market described here may not continue. The concentration risk and bond market risks outlined are real and material. A correction or bear market could occur at any time.

**The mention of specific companies, securities, or analyst opinions is for illustrative purposes only and is not an endorsement or recommendation** to buy, sell, or hold any investment. Price targets and forecasts cited are opinions, not guarantees.

**Always conduct your own research before making any investment decisions.** Consult a qualified financial professional who understands your personal situation, risk tolerance, and goals. Do not make financial decisions based solely on this article.