The Dot-Com Bubble: Is It Repeating? And Why the “Flight” to

When stocks surge, the market may seem to be in excellent shape. But investors’ shift from technology companies to more stable sectors may signal something different. What is a financial bubble? How can we tell when stock prices have become excessive? And why are analysts revisiting the lessons of 2000?

Bank of America analysts have warned that some patterns in the U.S. stock market resemble movements that preceded the dot-com bubble’s burst in 2000, most notably the rise of sectors less sensitive to economic fluctuations. In this article, we explore what a financial bubble is, the difference between a stock’s price and its value, what defensive stocks are, how AI relates to investor concerns, and how to read these signals without confusing a warning with a prediction of a market crash.

First, imagine that everyone wants to buy the same company!

Suppose one of your university classmates starts a small company and, within a few years, manages to generate annual profits of one million riyals.

An investor decides to buy the company for 10 million riyals, but another offers 20 million. Then a third appears, willing to pay 50 million.

As word spreads about the company’s success and promising future, the asking price rises to 100 million riyals.

The surprising thing is that the company’s profits have not changed; it still earns one million riyals a year.

This raises an important economic question: Has the company actually become more valuable, or are investors simply willing to pay more because of their expectations for the future?

This simple question helps us understand one of the most fascinating topics in financial markets: bubbles.

On October 29, 2026, Business Insider published a report by journalist Jennifer Sor about a warning from Bank of America analysts that patterns were emerging in the U.S. stock market resembling some of the movements that preceded the collapse of internet companies more than a quarter of a century ago.

To understand why this warning matters, we first need to know how the stock market works.

What is the stock market, anyway?

When a company launches a business, it needs money to fund its operations and expansion.

One way to raise funds is to sell ownership stakes in the company to investors in the form of shares.

A share represents an ownership stake in a company. Anyone who buys a share owns a small part of it, depending on how many shares they hold.

Here’s an example:

If a company is divided into one million shares and you buy 1,000 shares, you own 0.1% of it.

Shareholders may benefit from a rise in the share price or from dividends the company decides to pay.

But owning shares does not guarantee a profit. Their price can rise or fall depending on the company’s performance, investor expectations, and economic conditions.

This brings us to a crucial concept: a share price reflects not only a company’s current earnings, but also investors’ expectations for its future earnings and the risks involved.

That is why a company’s shares may rise before it delivers the earnings investors expect, while shares in a profitable company may fall if its results come in below expectations.

What is a financial bubble, and when does a rise in stocks become concerning?

A financial bubble is a situation in which asset prices, such as stocks or real estate, rise to levels that are difficult to justify based on their economic value, with part of the increase driven by expectations that prices will keep rising.

To make the idea easier to understand, let’s return to our hypothetical company.

The company earns one million riyals a year, while investors’ valuation of it changes:

Notice that earnings have not changed, while the amount investors are willing to pay for the company has increased.

The third column shows an economic measure called the price-to-earnings ratio (P/E ratio).

It is calculated by dividing a company’s market value by its annual earnings, or by dividing the share price by earnings per share.

If the P/E ratio is 10, an investor is paying the equivalent of ten times the company’s current annual earnings to own it.

If it rises to 100, the investor is paying the equivalent of 100 times those earnings.

Does this necessarily mean the company is overvalued?

Not necessarily.

It may be a fast-growing company, and investors may expect its earnings to double in the coming years.

But if those expectations are not met, investors may realize they paid a high price relative to what the company can actually earn.

First lesson: A rising share price is not enough to prove an investment is successful, just as a high P/E ratio alone does not prove that a bubble exists.

What matters most is the relationship between price, expected earnings, and risk.

What happened in the dot-com bubble of 2000?

In the 1990s, the internet began spreading rapidly, and companies emerged promising to transform commerce, communications, and services.

Enthusiasm was intense: investors saw a new technology that could change the world.

And, to a large extent, they were right.

The problem, however, lay in expectations for some companies’ earnings.

The share prices of many internet companies rose even though some were not profitable or lacked a clear business model that could ensure they would become profitable in the future.

Over time, investors began reassessing these companies.

Could they generate the revenue they had promised? Could they become profitable? Were they worth the prices they had reached?

As confidence began to fade, technology stocks suffered steep declines.

According to Goldman Sachs, the Nasdaq peaked at around 5,048 points on March 10, 2000, before falling about 77% by October 4, 2002.

What is the Nasdaq?

It is one of the indexes that tracks the performance of a large group of stocks listed on the U.S. Nasdaq market, including a significant number of technology companies.

A 77% loss means that a hypothetical investment moving in line with the index, worth 10,000 riyals at the peak, would fall to around 2,300 riyals.

But we should keep one important fact in mind:

The internet did not fail. It later became an essential part of the global economy.

What failed was the ability of many companies to meet the lofty financial expectations that had been built into their share prices.

That is the historical lesson: a technology can succeed even as investors lose money after paying too much for shares in companies associated with it.

Why is this story resurfacing with AI?

More than a quarter of a century later, the global economy is undergoing another technological transformation, led by AI applications.

Companies are investing huge sums in developing software, building data centers, buying electronic processors, and supplying the energy needed to run intelligent systems.

The money companies spend on buying and developing long-term assets is called capital expenditure (CapEx).

This spending differs from day-to-day operating expenses, such as salaries and rent.

Suppose a technology company spends $10 billion building AI infrastructure.

This investment may increase its ability to offer new services and grow its revenue.

But there is a question that cannot be ignored:

Will future revenue and earnings be enough to justify the billions spent?

If the expected results materialize, the investments may pay off. But if revenue comes in below expectations, companies may reconsider their spending plans.

When a major company cuts its purchases of processors and data centers, the revenues of the companies supplying those products may be affected.

That is why investor concern extends beyond companies using AI to the entire chain of companies involved in developing and operating it.

Nevertheless, there are important differences from 2000.

In a speech delivered in November 2025, Federal Reserve Vice Chair Philip Jefferson explained that many large companies associated with AI have real and growing earnings, unlike many internet companies in the late 1990s.

He also noted that, relative to their earnings, these companies’ valuations were generally less extreme than those recorded during the dot-com bubble.

This means that similarities in investor enthusiasm are not enough to conclude that history will repeat itself in the same way.

What are defensive stocks, and why do investors buy them when they’re worried?

Imagine a family reviewing its budget because its monthly income has fallen.

It might decide to put off buying a new car, cancel a vacation, or spend less on luxury goods.

But can it stop buying food or medicine, or paying the electricity bill?

Not as easily.

This idea helps us understand defensive stocks.

These are shares in companies that typically operate in businesses where demand for their products and services remains relatively stable, even when economic activity slows.

Some of the main sectors considered relatively defensive are:

• Consumer staples: such as food, cleaning products, and essential household goods.
• Health care: such as medicines and medical services.
• Utilities: such as electricity, water, and gas.

By contrast, some sectors are more closely tied to changes in income, spending, and economic growth. These are known as cyclical sectors and include automobiles, hotels, and some industrial activities.

But it is important not to confuse the nature of a business with the safety of an investment.

A company selling essential products may maintain its sales better during an economic slowdown, but its share price can still fall if it is too high or the company faces financial problems.

So “defensive” means that demand is relatively stable; it does not mean that the stock is risk-free.

What did Bank of America observe in October 2026?

This brings us to the heart of the report published by Business Insider.

Bank of America analysts observed that some sectors less sensitive to economic fluctuations were performing strongly as concerns grew about AI companies’ valuations and the scale of their spending.

According to figures cited in the report, several U.S. sectors posted the following gains from the start of 2026 through October 29:

These figures matter, but interpreting them matters more than simply reading them.

Health care and consumer staples are considered relatively defensive, while energy and basic materials are not usually classified as purely defensive sectors, because their performance is affected by economic growth and commodity prices.

The Business Insider report linked the rise in the energy sector in particular to a surge in oil prices amid the war with Iran.

That is why we cannot say that all these gains resulted from investors seeking safety.

However, defensive sectors rising while some technology stocks become less attractive may point to a shift in how investors view risk.

This shift is known as sector rotation.

It means reallocating investments among economic sectors based on expectations for returns and risks, as well as economic conditions.

Investors may favor technology stocks when they expect strong economic growth, while some may lean toward more stable sectors as concerns mount.

Nevertheless, one sector’s rise relative to another does not, by itself, show how much money has moved into it; measuring actual flows requires additional data on investment activity.

Why did this shift bring the dot-com bubble to mind?

According to the Business Insider report, Bank of America analysts noted that sectors such as health care and basic materials briefly outperformed the S&P 500 in January 2000, before the major market declines that followed.

The S&P 500 is an index that tracks the performance of around 500 large U.S. companies and is widely used to gauge the overall direction of the U.S. stock market.

So when a group of sectors outperforms this index, it means they performed relatively better than the broader market over the period being measured.

The bank also pointed to similar patterns during previous periods of market turmoil, including the period before the stock-market crash associated with the onset of the COVID-19 pandemic in 2020.

The bank uses an internal measure known as the “Bubble Risk Indicator” to track price movements resembling patterns associated with financial bubbles.

According to the report, this indicator was approaching concerning levels.

But we need to understand the limits of this information.

The indicator is an analytical tool used by the bank, not a universal measure that can determine whether a bubble exists or when it will end.

A resemblance between two historical patterns does not necessarily mean they will have the same outcome.

In fact, an analysis published by Nasdaq Dorsey Wright on October 26, 2026, noted that some previous shifts toward defensive sectors were not followed by crashes, while in other cases markets continued to rise.

The lesson is that financial indicators help us assess probabilities, but they cannot give us certain knowledge of the future.

What do bond yields mean, and why do analysts watch them?

Bank of America’s observations were not limited to stocks; they also extended to the U.S. government bond market.

To understand this, we first need to know what a bond is.

A bond is a borrowing instrument: When a government issues a bond, it receives money from investors in exchange for a commitment to pay returns under specified terms and repay the principal at maturity.

Some bonds are bought and sold between investors before they mature.

This gives rise to an important economic relationship: when the price of a bond with fixed payments rises, its yield—calculated based on its new purchase price—falls, and vice versa.

Why does this matter?

Because falling government bond yields may reflect investors’ expectations of lower interest rates in the future or weaker economic growth. They may also be affected by other factors related to supply and demand and inflation.

Bank of America analysts viewed falling yields on some bonds alongside declines in AI-related stocks as a possible sign of concerns about slowing growth.

A slowdown in growth means that the economy is still growing, but at a slower pace than before.

A “growth shock” is a sudden negative change in expectations for economic activity, which may result from a decline in spending, investment, or demand.

So watching stocks alone is sometimes not enough to understand the market; bond movements may reveal economic expectations that are not clearly reflected in share prices.

Does this mean a financial crash is imminent?

The answer: We cannot say for certain.

There is a big difference between warning that risks are rising and predicting when the market will crash.

Prices may indeed be high, yet continue rising for a long time. They may fall modestly and then stabilize, or rise again once companies’ earnings improve.

A price correction may occur without turning into a broad market crash.

A market correction is a decline from high price levels. In markets, a drop of around 10% from a recent peak is commonly used to describe a correction in indexes.

A bubble, by contrast, describes the nature of a price increase and its relationship to economic value; it is not a specific percentage decline.

Bank of America’s report did not contain warnings alone. It also considered the possibility that markets could go through a phase in which risks become clearer and some imbalances ease, potentially allowing investor sentiment to improve later.

That is why a sound analysis does not treat every warning as a definitive announcement of an impending crisis.

How can we apply this lesson when following Saudi stocks?

Although the study covers the U.S. market, the concepts we have learned apply to analyzing financial markets in general, including the Saudi market.

When following the performance of a company listed on Tadawul, we can ask the same questions:

Has the company’s share price risen because its earnings improved, or because of lofty expectations for its future expansion?

Is the company’s business affected by changes in consumer spending, or is demand for its products more stable?

How do interest rates, raw material prices, or economic conditions affect its earnings?

Let’s consider a hypothetical example involving two companies.

The first sells essential food products, while the second makes luxury goods.

If consumer spending declines, the first company may be able to maintain more of its sales than the second.

But that does not necessarily mean its stock will be the better investment. The second company may be more efficient or have greater growth potential, or the first company’s share price may be higher than its earnings justify.

This is why it is important to combine an understanding of the economy, analysis of the company’s business, and an assessment of the share price.

The goal is not to choose a company based on its sector name, but to understand the factors that determine its value and the risks of investing in it.

Finally, how should you read news about rising stocks from now on?

The next time you read that a stock has risen 40% or that a sector has posted record gains, try not to stop at the number.

Ask yourself:

1. What has risen? The share price of one company, or an index representing an entire sector?
2. Why has it risen? Because earnings increased, investor expectations changed, or the price of a commodity such as oil went up?
3. Is the rise justified? Has the company become more capable of generating earnings, or are investors paying more for the same earnings?
4. What are the risks? What happens if expectations are not met?
5. What is happening across the rest of the market? Are all sectors rising, or is the advantage shifting from one sector to another?

These five questions cannot guarantee that you will predict stock prices, but they can help you move from tracking numbers to understanding what they mean.

What did the bubble teach us?!

The dot-com bubble of 2000 teaches us that the success of a new technology does not guarantee the success of every company working in that field, nor does it justify buying their shares at any price.

Bank of America’s warnings in October 2026 also show that investor behavior may change before companies’ results become clear, and that movements in defensive sectors can be one signal worth monitoring.

But a signal is not a definitive verdict, and historical similarities do not guarantee that events will repeat.

In financial markets, it is not enough to know whether prices are rising or falling; what matters most is understanding why they are moving, what justifies their value, and what risks could change their direction.

That is the difference between someone who reads stock news and someone who begins to understand the economy behind it.