Artificial intelligence remains one of the strongest forces supporting global  stock markets.

From semiconductors and cloud computing to data centres, networking equipment and enterprise software, companies around the world are investing billions of dollars to build AI infrastructure.

At the same time, another powerful force is moving in the opposite direction.

The yield on the 10-year U.S. Treasury has moved close to 5%, reviving an old question for equity investors:

How high can technology stocks go when investors can earn close to 5% from U.S. government bonds?

This creates an unusual market tug-of-war.

On one side:

AI investment → faster expected growth → higher technology earnings

On the other:

Higher bond yields → more expensive capital → lower equity valuations

The outcome of this battle could help determine whether the global technology rally continues—or enters a much more difficult phase.

Why Are AI Stocks Still So Important to Global Markets?

Artificial intelligence is no longer simply a technology-sector story.

The AI investment cycle has spread across multiple industries.

Companies are spending heavily on:

• AI chips
• data centres
• cloud infrastructure
• networking equipment
• power generation
• cooling systems
• software platforms
• cybersecurity
• enterprise automation

The companies benefiting from this investment cycle are some of the largest businesses in global stock indices.

That means AI-related shares have a disproportionate influence on benchmarks such as the S&P 500 and Nasdaq Composite.

When large technology companies rise strongly, they can lift entire market indices.

But this concentration also creates risk.

If AI-related stocks weaken together, the same market-cap weighting that helped indices rise can work in reverse.

Why Are Treasury Yields Becoming a Problem?

The 10-year U.S. Treasury yield is one of the most important interest rates in global finance.

It influences:

• mortgages
• corporate borrowing
• government financing
• equity valuation models
• global capital flows
• currency markets

In early September 2026, the 10-year Treasury yield moved close to the psychologically important 5% level, after rising sharply over recent months.

Markets have become increasingly sensitive to this move because a 5% Treasury yield changes the relative attractiveness of stocks.

An investor can ask a simple question:

Why should I take substantial equity risk if a high-quality government bond is offering close to 5%?

That does not mean investors will automatically sell stocks.

But stocks must offer a sufficiently attractive expected return to justify the additional risk.

Why High Yields Hurt Growth Stocks More

Technology and other growth stocks are particularly sensitive to interest rates.

The reason comes from how investors value companies.

A large part of a high-growth company's value may depend on earnings expected many years into the future.

Those future profits are converted into today's value using what is known as a discount rate.

When interest rates rise, the discount rate typically rises as well.

That reduces the present value of future earnings.

In simple terms:

Higher interest rates make future profits worth less today.

This is why technology shares often react more strongly to bond-yield movements than mature companies with stable current cash flows.

A Simple Valuation Example

Imagine two companies.

Company A earns substantial cash today and is expected to grow slowly.

Company B earns less today but is expected to generate much larger profits ten years from now.

If interest rates are very low, investors may be willing to pay a high price today for Company B's future growth.

Now suppose the risk-free yield rises toward 5%.

Investors may demand a much higher return before waiting ten years for those profits.

The valuation multiple they are willing to pay can fall.

This is one reason the Nasdaq Composite tends to be closely watched when Treasury yields rise.

The Nasdaq has a much greater exposure to growth-oriented technology businesses than many broader market benchmarks.

Why Has the Technology Rally Survived So Far?

If high bond yields are negative for growth-stock valuations, why have many AI-related stocks remained resilient?

Because earnings growth matters too.

The impact of higher interest rates can be overcome when companies produce sufficiently strong revenue and profit growth.

This is currently one of the biggest arguments supporting AI stocks.

Demand for AI computing infrastructure remains strong.

Semiconductor companies continue to benefit from spending on advanced chips.

Cloud providers are investing aggressively in AI capacity.

Technology companies are expanding data-centre infrastructure.

That means investors are not simply buying a story.

They are also responding to real capital expenditure and, in many cases, real earnings growth.

This distinction is critical.

The Market Equation Has Changed

During periods of very low interest rates, technology companies could sometimes receive high valuations largely because investors expected strong future growth.

The current environment is different.

With Treasury yields approaching 5%, the market may demand stronger proof.

The equation becomes:

Higher valuation + high interest rates = greater earnings expectations

In other words, expensive technology stocks may need to keep producing exceptional results.

An earnings miss that investors might have overlooked during a low-rate environment could become much more important when bond yields are high.

AI Capital Spending Is Becoming Enormous

One reason investors remain optimistic is the scale of investment taking place across the technology sector.

Major technology companies are spending unprecedented amounts on data centres, computing infrastructure and AI capacity.

This spending is supporting demand across the AI ecosystem.

The beneficiaries extend far beyond chip designers.

They include businesses involved in:

• semiconductor manufacturing
• advanced memory
• data-centre construction
• electrical infrastructure
• cloud services
• fibre connectivity
• networking
• energy generation

The AI investment cycle therefore has the potential to support earnings across a surprisingly broad part of the global economy.

But the size of this spending also creates another question.

When Does AI Spending Become Too Much?

Capital expenditure is positive when it eventually generates attractive returns.

But large investment programmes become risky if revenue does not grow fast enough to justify them.

Imagine a company spends $100 billion building AI infrastructure.

Investors may initially celebrate the investment because it signals confidence in future demand.

But eventually the market asks:

How much additional revenue will this infrastructure generate?

And:

What return will the company earn on that investment?

This is where the AI investment story may gradually shift.

The first phase was about building infrastructure.

The next phase is increasingly about proving that the infrastructure can generate sustainable profits.

AI Revenue vs AI Spending

This may become one of the most important investment questions of the next several years.

For the AI boom to remain financially sustainable:

AI-related revenue growth must eventually justify AI-related capital spending.

If revenue grows rapidly, today's enormous infrastructure investment may look sensible in hindsight.

If monetisation develops more slowly, investors could begin questioning whether companies have overbuilt capacity.

That does not necessarily mean AI itself is a bubble.

A technology can be genuinely transformative while some investments made around that technology still produce poor returns.

The internet is a good historical example.

The internet changed the world.

But many companies that attracted huge valuations during the late 1990s did not survive.

Technology adoption and investment returns are not always the same thing.

Is Today's AI Boom Another Dot-Com Bubble?

Comparisons with the dot-com era are understandable, but they should be used carefully.

There are major differences.

Many of today's leading AI companies are large, profitable businesses with significant cash flows.

The strongest technology companies generate billions of dollars in annual profits and already have global customer bases.

During the dot-com boom, many highly valued businesses had little revenue and no profits.

That makes today's environment fundamentally different in several respects.

However, there are still similarities worth watching:

• excitement around a transformative technology
• large amounts of capital moving into one theme
• rapid valuation expansion
• market concentration
• aggressive infrastructure spending
• assumptions of very high future growth

The key question is not whether AI resembles the internet.

It is whether today's  stock prices already assume too much future success.

Why 5% Matters Psychologically

There is nothing magical about exactly 5%.

Markets do not automatically collapse when the 10-year Treasury yield crosses that number.

But round numbers matter psychologically.

A Treasury yield beginning with a "5" can change how investors think about asset allocation.

Consider an investor choosing between:

U.S. Treasury: approximately 5%

versus

Technology stock: uncertain return with potentially significant volatility

The technology company must offer enough expected earnings growth to compensate the investor for taking additional risk.

That raises the hurdle for expensive stocks.

What Could Push Treasury Yields Above 5%?

Several factors can influence long-term Treasury yields.

Persistent Inflation

If inflation remains elevated, investors may demand higher yields to compensate for the loss of purchasing power.

Federal Reserve Policy

If markets expect interest rates to remain high—or move higher—long-term bond yields may stay elevated.

Government Borrowing

Large U.S. budget deficits require substantial Treasury issuance.

Greater bond supply can put upward pressure on yields if investor demand does not increase at the same pace.

Strong Economic Growth

Strong economic activity can also push yields higher because investors expect tighter monetary policy and potentially higher inflation.

Rising Energy Prices

Higher oil prices can increase inflation expectations, which can then influence bond yields.

This is why technology investors increasingly need to watch macroeconomic variables that may seem unrelated to technology itself.

Can Technology Stocks Rise With 5% Yields?

Yes.

High bond yields do not automatically prevent technology stocks from rising.

The key is the relationship between interest rates and earnings growth.

Consider three possibilities.

Strong Earnings + High Yields

If AI companies continue generating exceptional revenue and earnings growth, equities can potentially absorb higher interest rates.

The growth in profits may offset valuation pressure.

Weak Earnings + Falling Yields

Lower bond yields could support valuations even if earnings growth slows somewhat.

This can create a favourable environment for long-duration growth stocks.

Weak Earnings + High Yields

This is the most difficult combination.

If earnings expectations fall while Treasury yields remain near or above 5%, technology stocks could face pressure from both directions.

That is the scenario investors should watch most carefully.

Why Market Concentration Matters

Another issue is the growing influence of a relatively small group of very large technology companies.

Because major U.S. indices are weighted by market capitalisation, the largest companies have greater influence over index movements.

A strong performance from a handful of mega-cap technology shares can therefore make the overall market appear healthier than the average stock.

This creates an important distinction between:

Index performance

and

market breadth

Investors can track the broader S&P 500 alongside the technology-heavy Nasdaq Composite to see whether market gains are becoming broader or remain concentrated in technology.

If the Nasdaq substantially outperforms while many other sectors weaken, the rally may be increasingly dependent on AI and technology stocks.

What Happens If Bond Yields Suddenly Jump?

The speed of a move can matter as much as the level.

Markets can gradually adapt to high interest rates.

A rapid move is more difficult.

If the 10-year yield rises quickly from around 4.8% to well above 5%, investors may need to reprice assets suddenly.

That can affect:

• technology valuations
• corporate bond yields
• mortgage rates
• leveraged investment positions
• the U.S. dollar
• emerging markets

Sharp yield increases can therefore create volatility even if the underlying economy remains relatively strong.

What Happens If Yields Start Falling?

Falling yields could provide another boost to technology valuations.

If inflation moderates and markets begin expecting easier Federal Reserve policy, lower discount rates could increase the present value of future technology earnings.

That would create a powerful combination:

AI earnings growth + falling interest rates

Historically, that type of environment can be very supportive for growth stocks.

However, investors would still need to understand why yields are falling.

If yields fall because inflation is easing while economic growth remains healthy, that can be constructive.

If yields fall because investors fear a recession, the effect may be much less positive.

Could AI Investment Itself Keep Bond Yields High?

This is an increasingly interesting question.

The AI boom requires extraordinary amounts of investment.

Building data centres requires:

• land
• construction
• electrical equipment
• semiconductor equipment
• power generation
• networking hardware
• financing

If companies and infrastructure providers continue borrowing heavily to fund these projects, the AI investment boom itself could contribute to stronger demand for capital.

That means AI could create an unusual feedback loop.

AI investment supports technology earnings

but

AI investment also increases demand for capital

which can contribute to:

higher financing costs and higher yields

In that sense, one of the forces supporting technology stocks could indirectly contribute to the higher-rate environment challenging their valuations.

The Power Problem Behind AI

Artificial intelligence does not only require computing power.

It requires enormous amounts of electricity.

As AI data centres expand, electricity demand is becoming an increasingly important part of the technology investment story.

This could create opportunities in sectors not traditionally classified as technology:

• utilities
• power infrastructure
• natural gas
• nuclear energy
• electrical equipment
• grid technology
• cooling systems

The next phase of the AI trade may therefore become broader than semiconductor stocks alone.

Investors may increasingly ask:

Who provides the physical infrastructure needed to run AI?

What Does This Mean for Asian Markets?

The AI cycle is increasingly global.

Asia plays a central role in semiconductor manufacturing, memory chips and electronics supply chains.

Companies and markets across Taiwan, South Korea and Japan can react strongly to changes in global semiconductor demand.

Technology-led moves on Wall Street therefore frequently influence Asian trading sessions.

Investors can monitor major regional benchmarks and futures through LiveWorldMarket's Global Index Futures Hub and broader Global Market Dashboard.

This can help show whether an AI-driven rally is remaining concentrated in the United States or spreading through the wider global technology supply chain.

What Could It Mean for India?

India has less direct exposure to semiconductor manufacturing than some East Asian markets, but the global technology cycle still matters.

Indian IT services companies earn substantial revenue from U.S. and international clients.

If AI investment increases enterprise technology spending, Indian IT companies may benefit from new projects involving:

• cloud migration
• AI integration
• data engineering
• automation
• cybersecurity
• enterprise transformation

But there is another side.

If higher U.S. rates eventually slow economic activity or corporate spending, technology budgets could become more constrained.

Indian investors therefore need to watch both the AI spending cycle and the U.S. interest-rate cycle.

Five Things Investors Should Watch Now

Rather than trying to predict whether the AI rally will simply continue or collapse, investors can monitor a small set of indicators.

1. U.S. 10-Year Treasury Yield

Watch whether yields remain close to 5%, sustainably move above it or retreat.

The direction and speed of the move are both important.

2. Nasdaq vs S&P 500

Compare the performance of the Nasdaq Composite with the S&P 500.

Continued Nasdaq outperformance may suggest that technology remains the dominant market theme.

3. AI Company Earnings

Revenue growth, margins, forward guidance and AI-related demand may matter more than headline excitement.

4. Capital Expenditure

Watch how much major technology companies are spending on AI infrastructure—and whether management teams can explain the expected returns.

5. Market Breadth

A healthy bull market usually becomes broader over time.

If only a small group of AI-related companies continues rising while the rest of the market weakens, concentration risk may increase.

Three Possible Scenarios for the Global Tech Rally

Scenario 1: AI Growth Remains Strong and Yields Stabilise

This is arguably the most favourable environment.

AI demand remains strong.

Corporate earnings continue rising.

Treasury yields remain high but stop moving sharply upward.

Investors gradually become comfortable with the new interest-rate environment.

Technology stocks could continue advancing, although valuations may become increasingly important.

Scenario 2: Treasury Yields Move Above 5%

Inflation remains persistent.

Bond yields rise further.

Higher discount rates begin pressuring technology valuations.

The strongest companies may remain resilient, but weaker or highly speculative AI-related stocks could experience larger corrections.

This environment could produce a significant separation between high-quality AI businesses and companies benefiting mainly from the theme.

Scenario 3: AI Earnings Disappoint

This would potentially create the greatest risk.

If companies continue spending enormous amounts on AI infrastructure but revenue growth fails to meet expectations, investors may start questioning future returns.

If this happens while Treasury yields remain high, the sector could face both an earnings problem and a valuation problem simultaneously.

Is the Global Tech Rally About to End?

There is not enough evidence to make that conclusion simply because Treasury yields are approaching 5%.

Technology companies can continue rising in a high-rate environment if earnings growth remains strong enough.

But the investment environment is clearly becoming more demanding.

The market may increasingly distinguish between:

companies producing real AI revenue

and

companies simply associated with the AI theme.

That distinction could become one of the defining features of the next stage of the technology cycle.

The Bigger Question: Growth or Valuation?

The battle between AI stocks and Treasury yields ultimately comes down to two numbers:

How quickly are earnings growing?

and

What price are investors paying for those earnings?

AI can transform industries.

It can increase productivity.

It can generate enormous new markets.

But even an exceptional company can become a poor investment if investors pay an excessive price.

Likewise, high bond yields do not automatically make technology stocks unattractive if their earnings grow fast enough.

The real equation is:

Future earnings growth versus today's valuation and interest-rate environment.

Final Thoughts

The AI boom and high Treasury yields represent two powerful forces pulling global markets in opposite directions.

Artificial intelligence is creating one of the largest technology investment cycles in decades.

At the same time, a U.S. 10-year Treasury yield close to 5% is increasing the return investors can earn without taking equity-market risk.

That creates a much higher hurdle for technology companies.

The next stage of the global tech rally may therefore depend less on excitement around AI and more on something much simpler:

Can earnings grow fast enough to justify today's valuations?

If the answer remains yes, technology stocks may continue to withstand elevated interest rates.

If earnings expectations weaken while yields stay high, the market could become much less forgiving.

For investors, the important indicators are increasingly connected:

AI spending → earnings growth → valuations → Treasury yields → liquidity → global equity performance

Readers can follow the Nasdaq Composite, S&P 500, major global futures and regional indices through LiveWorldMarket's Global Indices & Futures Hub and Global Market Dashboard.

The AI story is far from over.

But with bond yields approaching 5%, the market may increasingly demand proof rather than promises.

Data note: Treasury yields, stock-index levels and monetary-policy expectations can change rapidly. Market conditions discussed in this article reflect the broader environment in September 2026 and should be checked against current market data when reading.

Disclaimer: This article is intended for general informational and educational purposes only. It does not constitute investment advice, investment research or a recommendation to buy or sell any security or financial instrument. Markets involve risk, and readers should conduct their own research and seek appropriately qualified professional advice where necessary.